Cisco WS-C2960X-48TS-L to HP-2530-24G trunk port not working.

[neeraj_dabas]

Hello team,

We are struggling with our Cisco WS-C2960X-48TS-L and HP-2530-24G.
HP-2530-24G having four SFP 25-28.
We connected 2960X Port 51 to HP-2530's port 27.
On Cisco switch we configured multiple VLANs i.e. VLAN 10,20,30,60,80.
On HP switch we need only two VLANs 30 and 80, so we configured accordingly, port 27 is tagged under both VLANs.
Cisco port 51 is an access port and we passed vlan 30 on that port, everything working well in this scenario.

But as per our requirement we need VLAN 80 too on HP switch, so the issue is whenever we convert Cisco port 51 to trunk , the link between cisco and HP drops, we lose access to HP switch and devices behind that switch.

can someone help on this ?
Thanks

[Flavio Miranda]

Hi @neeraj_dabas 

Seems to me like a Spanning-tree problem.  It seems you are causing a loop on the switch and this can explain the crash.

[neeraj_dabas]

Thanks for the quick reply @Flavio Miranda .
Can you please explain a little bit more about the issue, and some troubleshooting steps to resolve this, I will appreciate your efforts.

[Flavio Miranda]

@neeraj_dabas , check the logs on the switch that might have some information about what happens when you connect both switches in trunk.

 if possible you share the logs here it would be great

[neeraj_dabas]

Aug 19 08:11:08.809: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/30, changed state to up
Aug 19 08:11:22.283: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/30, changed state to down
Aug 19 08:11:23.283: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/30, changed state to down
Aug 19 08:11:31.566: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/30, changed state to up
Aug 19 08:11:32.570: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/30, changed state to up
Aug 19 09:57:27.548: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:27.548: encap SNAP linktype sstp vlan 1 len 64 on v1 Gi1/0/50
Aug 19 09:57:27.548: AA AA 03 00000C 010B SSTP
Aug 19 09:57:27.548: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000014
Aug 19 09:57:27.548: B:8001 0008.3248.ad00 80.1C A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:27.548: T:0000 L:0002 D:0001
Aug 19 09:57:27.548: STP SW: RX ISR: 0180.c200.0000<-0008.3248.ad1c type/len 0026
Aug 19 09:57:27.548: encap SAP linktype ieee-st vlan 1 len 60 on v1 Gi1/0/50
Aug 19 09:57:27.548: 42 42 03 SPAN
Aug 19 09:57:27.548: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000014
Aug 19 09:57:27.548: B:8001 0008.3248.ad00 80.1C A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:27.548: STP SW: PROC RX: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:27.548: encap SNAP linktype sstp vlan 1 len 64 on v1 Gi1/0/50
Aug 19 09:57:27.548: AA AA 03 00000C 010B SSTP
Aug 19 09:57:27.548: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000014
Aug 19 09:57:27.548: B:8001 0008.3248.ad00 80.1C A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:27.548: T:0000 L:0002 D:0001
Aug 19 09:57:27.548: STP SW: PROC RX: 0180.c200.0000<-0008.3248.ad1c type/len 0026
Aug 19 09:57:27.548: encap SAP linktype ieee-st vlan 1 len 60 on v1 Gi1/0/50
Aug 19 09:57:27.548: 42 42 03 SPAN
Aug 19 09:57:27.548: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000014
Aug 19 09:57:27.548: B:8001 0008.3248.ad00 80.1C A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:27.548: STP: VLAN0001 rx BPDU: config protocol = ieee, packet from GigabitEthernet1/0/50 , linktype IEEE_SPANNING , enctype 2, encsize 17
Aug 19 09:57:27.548: STP: enc 01 80 C2 00 00 00 00 08 32 48 AD 1C 00 26 42 42 03
Aug 19 09:57:27.551: STP: Data 0000000000800100083248858000000014800100083248AD00801C0600140002000F00
Aug 19 09:57:27.551: STP: VLAN0001 Gi1/0/50:0000 00 00 00 8001000832488580 00000014 800100083248AD00 801C 0600 1400 0200 0F00
Aug 19 09:57:27.551: STP(1) port Gi1/0/50 supersedes 0
Aug 19 09:57:27.551: STP: opt: VLAN0001: get ports: no free chunk available
Aug 19 09:57:27.551: STP SW: TX: sstp copy: 0100.0ccc.cccd<-0008.3249.05b0 type/len 0032
Aug 19 09:57:27.551: encap SNAP linktype sstp vlan 1 len 64 on v1 Gi1/0/48
Aug 19 09:57:27.551: AA AA 03 00000C 010B SSTP
Aug 19 09:57:27.551: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000018
Aug 19 09:57:27.551: B:8001 0008.3249.0580 80.30 A:0700 M:1400 H:0200 F:0F00
Aug 19 09:57:27.551: T:0000 L:0002 D:0001
Aug 19 09:57:27.551: STP SW: TX: 0180.c200.0000<-0008.3249.05b0 type/len 0026
Aug 19 09:57:27.551: encap SAP linktype ieee-st vlan 1 len 60 on v1 Gi1/0/48
Aug 19 09:57:27.551: 42 42 03 SPAN
Aug 19 09:57:27.551: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000018
Aug 19 09:57:27.551: B:8001 0008.3249.0580 80.30 A:0700 M:1400 H:0200 F:0F00
Aug 19 09:57:27.551: STP: VLAN0001 Gi1/0/48 tx BPDU: config protocol=ieee
Data : 0000 00 00 00 8001000832488580 00000018 8001000832490580 8030 0700 1400 0200 0F00
Aug 19 09:57:27.922: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:27.925: encap SNAP linktype sstp vlan 10 len 64 on v10 Gi1/0/50
Aug 19 09:57:27.925: AA AA 03 00000C 010B SSTP
Aug 19 09:57:27.925: CFG P:0000 V:00 T:00 F:00 R:800A 0008.3248.ad00 00000000
Aug 19 09:57:27.925: B:800A 0008.3248.ad00 80.1C A:0000 M:1400 H:0200 F:0F00
Aug 19 09:57:27.925: T:0000 L:0002 D:000A
Aug 19 09:57:27.932: STP SW: PROC RX: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:27.932: encap SNAP linktype sstp vlan 10 len 64 on v10 Gi1/0/50
Aug 19 09:57:27.932: AA AA 03 00000C 010B SSTP
Aug 19 09:57:27.932: CFG P:0000 V:00 T:00 F:00 R:800A 0008.3248.ad00 00000000
Aug 19 09:57:27.932: B:800A 0008.3248.ad00 80.1C A:0000 M:1400 H:0200 F:0F00
Aug 19 09:57:27.932: T:0000 L:0002 D:000A
Aug 19 09:57:27.932: STP: VLAN0010 rx BPDU: config protocol = ieee, packet from GigabitEthernet1/0/50 , linktype SSTP , enctype 3, encsize 22
Aug 19 09:57:27.932: STP: enc 01 00 0C CC CC CD 00 08 32 48 AD 1C 00 32 AA AA 03 00 00 0C 01 0B
Aug 19 09:57:27.932: STP: Data 0000000000800A00083248AD0000000000800A00083248AD00801C0000140002000F00
Aug 19 09:57:27.936: STP: VLAN0010 Gi1/0/50:0000 00 00 00 800A00083248AD00 00000000 800A00083248AD00 801C 0000 1400 0200 0F00
Aug 19 09:57:27.936: STP(10) port Gi1/0/50 supersedes 0
Aug 19 09:57:27.936: STP: opt: VLAN0010: get ports: no free chunk available
Aug 19 09:57:27.936: STP SW: TX: 0100.0ccc.cccd<-0008.3249.05b0 type/len 0032
Aug 19 09:57:27.936: encap SNAP linktype sstp vlan 10 len 64 on v10 Gi1/0/48
Aug 19 09:57:27.936: AA AA 03 00000C 010B SSTP
Aug 19 09:57:27.936: CFG P:0000 V:00 T:00 F:00 R:800A 0008.3248.ad00 00000004
Aug 19 09:57:27.936: B:800A 0008.3249.0580 80.30 A:0100 M:1400 H:0200 F:0F00
Aug 19 09:57:27.936: T:0000 L:0002 D:000A
Aug 19 09:57:27.936: STP: VLAN0010 Gi1/0/48 tx BPDU: config protocol=ieee
Data : 0000 00 00 00 800A00083248AD00 00000004 800A000832490580 8030 0100 1400 0200 0F00
Aug 19 09:57:28.296: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:28.296: encap SNAP linktype sstp vlan 80 len 64 on v80 Gi1/0/50
Aug 19 09:57:28.296: AA AA 03 00000C 010B SSTP
Aug 19 09:57:28.296: CFG P:0000 V:00 T:00 F:00 R:8000 cc9c.3e7a.2191 00000020
Aug 19 09:57:28.296: B:8050 0008.3248.ad00 80.1C A:0800 M:1400 H:0200 F:0F00
Aug 19 09:57:28.296: T:0000 L:0002 D:0050
Aug 19 09:57:28.296: STP SW: PROC RX: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:28.296: encap SNAP linktype sstp vlan 80 len 64 on v80 Gi1/0/50
Aug 19 09:57:28.299: AA AA 03 00000C 010B SSTP
Aug 19 09:57:28.299: CFG P:0000 V:00 T:00 F:00 R:8000 cc9c.3e7a.2191 00000020
Aug 19 09:57:28.299: B:8050 0008.3248.ad00 80.1C A:0800 M:1400 H:0200 F:0F00
Aug 19 09:57:28.299: T:0000 L:0002 D:0050
Aug 19 09:57:28.299: STP: VLAN0080 rx BPDU: config protocol = ieee, packet from GigabitEthernet1/0/50 , linktype SSTP , enctype 3, encsize 22
Aug 19 09:57:28.299: STP: enc 01 00 0C CC CC CD 00 08 32 48 AD 1C 00 32 AA AA 03 00 00 0C 01 0B
Aug 19 09:57:28.299: STP: Data 00000000008000CC9C3E7A219100000020805000083248AD00801C0800140002000F00
Aug 19 09:57:28.299: STP: VLAN0080 Gi1/0/50:0000 00 00 00 8000CC9C3E7A2191 00000020 805000083248AD00 801C 0800 1400 0200 0F00
Aug 19 09:57:28.299: STP(80) port Gi1/0/50 supersedes 0
Aug 19 09:57:28.299: STP: opt: VLAN0080: get ports: no free chunk available
Aug 19 09:57:28.299: STP SW: TX: 0100.0ccc.cccd<-0008.3249.05b0 type/len 0032
Aug 19 09:57:28.299: encap SNAP linktype sstp vlan 80 len 64 on v80 Gi1/0/48
Aug 19 09:57:28.299: AA AA 03 00000C 010B SSTP
Aug 19 09:57:28.299: CFG P:0000 V:00 T:00 F:00 R:8000 cc9c.3e7a.2191 00000024
Aug 19 09:57:28.299: B:8050 0008.3249.0580 80.30 A:0900 M:1400 H:0200 F:0F00
Aug 19 09:57:28.299: T:0000 L:0002 D:0050
Aug 19 09:57:28.299: STP: VLAN0080 Gi1/0/48 tx BPDU: config protocol=ieee
Data : 0000 00 00 00 8000CC9C3E7A2191 00000024 8050000832490580 8030 0900 1400 0200 0F00
Aug 19 09:57:28.537: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:28.537: encap SNAP linktype sstp vlan 60 len 64 on v60 Gi1/0/50
Aug 19 09:57:28.537: AA AA 03 00000C 010B SSTP
Aug 19 09:57:28.537: CFG P:0000 V:00 T:00 F:00 R:803C 0008.3248.8580 00000014
Aug 19 09:57:28.537: B:803C 0008.3248.ad00 80.1C A:0500 M:1400 H:0200 F:0F00
Aug 19 09:57:28.537: T:0000 L:0002 D:003C
Aug 19 09:57:28.537: STP SW: PROC RX: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:28.537: encap SNAP linktype sstp vlan 60 len 64 on v60 Gi1/0/50
Aug 19 09:57:28.537: AA AA 03 00000C 010B SSTP
Aug 19 09:57:28.537: CFG P:0000 V:00 T:00 F:00 R:803C 0008.3248.8580 00000014
Aug 19 09:57:28.537: B:803C 0008.3248.ad00 80.1C A:0500 M:1400 H:0200 F:0F00
Aug 19 09:57:28.537: T:0000 L:0002 D:003C
Aug 19 09:57:28.537: STP: VLAN0060 rx BPDU: config protocol = ieee, packet from GigabitEthernet1/0/50 , linktype SSTP , enctype 3, encsize 22
Aug 19 09:57:28.537: STP: enc 01 00 0C CC CC CD 00 08 32 48 AD 1C 00 32 AA AA 03 00 00 0C 01 0B
Aug 19 09:57:28.537: STP: Data 0000000000803C00083248858000000014803C00083248AD00801C0500140002000F00
Aug 19 09:57:28.537: STP: VLAN0060 Gi1/0/50:0000 00 00 00 803C000832488580 00000014 803C00083248AD00 801C 0500 1400 0200 0F00
Aug 19 09:57:28.541: STP(60) port Gi1/0/50 supersedes 0
Aug 19 09:57:28.541: STP: opt: VLAN0060: get ports: no free chunk available
Aug 19 09:57:28.541: STP SW: TX: 0100.0ccc.cccd<-0008.3249.05b0 type/len 0032
Aug 19 09:57:28.541: encap SNAP linktype sstp vlan 60 len 64 on v60 Gi1/0/48
Aug 19 09:57:28.541: AA AA 03 00000C 010B SSTP
Aug 19 09:57:28.541: CFG P:0000 V:00 T:00 F:00 R:803C 0008.3248.8580 00000018
Aug 19 09:57:28.541: B:803C 0008.3249.0580 80.30 A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:28.541: T:0000 L:0002 D:003C
Aug 19 09:57:28.541: STP: VLAN0060 Gi1/0/48 tx BPDU: config protocol=ieee
Data : 0000 00 00 00 803C000832488580 00000018 803C000832490580 8030 0600 1400 0200 0F00
Aug 19 09:57:28.551: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:28.551: encap SNAP linktype sstp vlan 1 len 64 on v1 Gi1/0/50
Aug 19 09:57:28.551: AA AA 03 00000C 010B SSTP
Aug 19 09:57:28.551: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000014
Aug 19 09:57:28.551: B:8001 0008.3248.ad00 80.1C A:0500 M:1400 H:0200 F:0F00
Aug 19 09:57:28.551: T:0000 L:0002 D:0001
Aug 19 09:57:28.551: STP SW: RX ISR: 0180.c200.0000<-0008.3248.ad1c type/len 0026
Aug 19 09:57:28.555: encap SAP linktype ieee-st vlan 1 len 60 on v1 Gi1/0/50
Aug 19 09:57:28.555: 42 42 03 SPAN
Aug 19 09:57:28.555: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000014
Aug 19 09:57:28.555: B:8001 0008.3248.ad00 80.1C A:0500 M:1400 H:0200 F:0F00
Aug 19 09:57:28.555: STP SW: PROC RX: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:28.555: encap SNAP linktype sstp vlan 1 len 64 on v1 Gi1/0/50
Aug 19 09:57:28.555: AA AA 03 00000C 010B SSTP
Aug 19 09:57:28.555: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000014
Aug 19 09:57:28.555: B:8001 0008.3248.ad00 80.1C A:0500 M:1400 H:0200 F:0F00
Aug 19 09:57:28.555: T:0000 L:0002 D:0001
Aug 19 09:57:28.555: STP SW: PROC RX: 0180.c200.0000<-0008.3248.ad1c type/len 0026
Aug 19 09:57:28.555: encap SAP linktype ieee-st vlan 1 len 60 on v1 Gi1/0/50
Aug 19 09:57:28.555: 42 42 03 SPAN
Aug 19 09:57:28.555: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000014
Aug 19 09:57:28.555: B:8001 0008.3248.ad00 80.1C A:0500 M:1400 H:0200 F:0F00
Aug 19 09:57:28.555: STP: VLAN0001 rx BPDU: config protocol = ieee, packet from GigabitEthernet1/0/50 , linktype IEEE_SPANNING , enctype 2, encsize 17
Aug 19 09:57:28.555: STP: enc 01 80 C2 00 00 00 00 08 32 48 AD 1C 00 26 42 42 03
Aug 19 09:57:28.555: STP: Data 0000000000800100083248858000000014800100083248AD00801C0500140002000F00
Aug 19 09:57:28.555: STP: VLAN0001 Gi1/0/50:0000 00 00 00 8001000832488580 00000014 800100083248AD00 801C 0500 1400 0200 0F00
Aug 19 09:57:28.558: STP(1) port Gi1/0/50 supersedes 0
Aug 19 09:57:28.558: STP: opt: VLAN0001: get ports: no free chunk available
Aug 19 09:57:28.558: STP SW: TX: sstp copy: 0100.0ccc.cccd<-0008.3249.05b0 type/len 0032
Aug 19 09:57:28.558: encap SNAP linktype sstp vlan 1 len 64 on v1 Gi1/0/48
Aug 19 09:57:28.558: AA AA 03 00000C 010B SSTP
Aug 19 09:57:28.558: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000018
Aug 19 09:57:28.558: B:8001 0008.3249.0580 80.30 A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:28.558: T:0000 L:0002 D:0001
Aug 19 09:57:28.558: STP SW: TX: 0180.c200.0000<-0008.3249.05b0 type/len 0026
Aug 19 09:57:28.558: encap SAP linktype ieee-st vlan 1 len 60 on v1 Gi1/0/48
Aug 19 09:57:28.558: 42 42 03 SPAN
Aug 19 09:57:28.558: CFG P:0000 V:00 T:00 F:00 R:8001 0008.3248.8580 00000018
Aug 19 09:57:28.558: B:8001 0008.3249.0580 80.30 A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:28.558: STP: VLAN0001 Gi1/0/48 tx BPDU: config protocol=ieee
Data : 0000 00 00 00 8001000832488580 00000018 8001000832490580 8030 0600 1400 0200 0F00
Aug 19 09:57:29.184: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:29.184: encap SNAP linktype sstp vlan 30 len 64 on v30 Gi1/0/50
Aug 19 09:57:29.184: AA AA 03 00000C 010B SSTP
Aug 19 09:57:29.184: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000014
Aug 19 09:57:29.184: B:801E 0008.3248.ad00 80.1C A:0500 M:1400 H:0200 F:0F00
Aug 19 09:57:29.184: T:0000 L:0002 D:001E
Aug 19 09:57:29.184: STP SW: PROC RX: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:29.184: encap SNAP linktype sstp vlan 30 len 64 on v30 Gi1/0/50
Aug 19 09:57:29.184: AA AA 03 00000C 010B SSTP
Aug 19 09:57:29.184: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000014
Aug 19 09:57:29.184: B:801E 0008.3248.ad00 80.1C A:0500 M:1400 H:0200 F:0F00
Aug 19 09:57:29.184: T:0000 L:0002 D:001E
Aug 19 09:57:29.184: STP: VLAN0030 rx BPDU: config protocol = ieee, packet from GigabitEthernet1/0/50 , linktype SSTP , enctype 3, encsize 22
Aug 19 09:57:29.184: STP: enc 01 00 0C CC CC CD 00 08 32 48 AD 1C 00 32 AA AA 03 00 00 0C 01 0B
Aug 19 09:57:29.184: STP: Data 00000000018000345DA803D3E900000014801E00083248AD00801C0500140002000F00
Aug 19 09:57:29.184: STP: VLAN0030 Gi1/0/50:0000 00 00 01 8000345DA803D3E9 00000014 801E00083248AD00 801C 0500 1400 0200 0F00
Aug 19 09:57:29.187: STP(30) port Gi1/0/50 supersedes 0
Aug 19 09:57:29.187: STP: opt: VLAN0030: get ports: no free chunk available
Aug 19 09:57:29.187: STP SW: TX: 0180.c200.0000<-0008.3249.059b type/len 0026
Aug 19 09:57:29.187: encap SAP linktype ieee-st vlan 30 len 60 on v30 Gi1/0/27
Aug 19 09:57:29.187: 42 42 03 SPAN
Aug 19 09:57:29.187: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000018
Aug 19 09:57:29.187: B:801E 0008.3249.0580 80.1B A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:29.187: STP: VLAN0030 Gi1/0/27 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 00000018 801E000832490580 801B 0600 1400 0200 0F00
Aug 19 09:57:29.187: STP SW: TX: 0180.c200.0000<-0008.3249.059e type/len 0026
Aug 19 09:57:29.187: encap SAP linktype ieee-st vlan 30 len 60 on v30 Gi1/0/30
Aug 19 09:57:29.187: 42 42 03 SPAN
Aug 19 09:57:29.187: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000018
Aug 19 09:57:29.187: B:801E 0008.3249.0580 80.1E A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:29.187: STP: VLAN0030 Gi1/0/30 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 00000018 801E000832490580 801E 0600 1400 0200 0F00
Aug 19 09:57:29.187: STP SW: TX: 0180.c200.0000<-0008.3249.05a0 type/len 0026
Aug 19 09:57:29.187: encap SAP linktype ieee-st vlan 30 len 60 on v30 Gi1/0/32
Aug 19 09:57:29.187: 42 42 03 SPAN
Aug 19 09:57:29.187: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000018
Aug 19 09:57:29.187: B:801E 0008.3249.0580 80.20 A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:29.187: STP: VLAN0030 Gi1/0/32 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 00000018 801E000832490580 8020 0600 1400 0200 0F00
Aug 19 09:57:29.191: STP SW: TX: 0180.c200.0000<-0008.3249.05ae type/len 0026
Aug 19 09:57:29.191: encap SAP linktype ieee-st vlan 30 len 60 on v30 Gi1/0/46
Aug 19 09:57:29.191: 42 42 03 SPAN
Aug 19 09:57:29.191: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000018
Aug 19 09:57:29.191: B:801E 0008.3249.0580 80.2E A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:29.191: STP: VLAN0030 Gi1/0/46 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 00000018 801E000832490580 802E 0600 1400 0200 0F00
Aug 19 09:57:29.191: STP SW: TX: 0100.0ccc.cccd<-0008.3249.05b0 type/len 0032
Aug 19 09:57:29.191: encap SNAP linktype sstp vlan 30 len 64 on v30 Gi1/0/48
Aug 19 09:57:29.191: AA AA 03 00000C 010B SSTP
Aug 19 09:57:29.191: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000018
Aug 19 09:57:29.191: B:801E 0008.3249.0580 80.30 A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:29.191: T:0000 L:0002 D:001E
Aug 19 09:57:29.191: STP: VLAN0030 Gi1/0/48 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 00000018 801E000832490580 8030 0600 1400 0200 0F00
Aug 19 09:57:29.191: STP SW: TX: 0180.c200.0000<-0008.3249.05b3 type/len 0026
Aug 19 09:57:29.191: encap SAP linktype ieee-st vlan 30 len 60 on v30 Gi1/0/51
Aug 19 09:57:29.191: 42 42 03 SPAN
Aug 19 09:57:29.191: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000018
Aug 19 09:57:29.191: B:801E 0008.3249.0580 80.33 A:0600 M:1400 H:0200 F:0F00
Aug 19 09:57:29.191: STP: VLAN0030 Gi1/0/51 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 00000018 801E000832490580 8033 0600 1400 0200 0F00
Aug 19 09:57:29.194: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:29.194: encap SNAP linktype sstp vlan 20 len 64 on v20 Gi1/0/50
Aug 19 09:57:29.194: AA AA 03 00000C 010B SSTP
Aug 19 09:57:29.194: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000028
Aug 19 09:57:29.194: B:8014 0008.3248.ad00 80.1C A:0A00 M:1400 H:0200 F:0F00
Aug 19 09:57:29.194: T:0000 L:0002 D:0014
Aug 19 09:57:29.194: STP SW: PROC RX: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:29.194: encap SNAP linktype sstp vlan 20 len 64 on v20 Gi1/0/50
Aug 19 09:57:29.194: AA AA 03 00000C 010B SSTP
Aug 19 09:57:29.194: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 00000028
Aug 19 09:57:29.194: B:8014 0008.3248.ad00 80.1C A:0A00 M:1400 H:0200 F:0F00
Aug 19 09:57:29.194: T:0000 L:0002 D:0014
Aug 19 09:57:29.194: STP: VLAN0020 rx BPDU: config protocol = ieee, packet from GigabitEthernet1/0/50 , linktype SSTP , enctype 3, encsize 22
Aug 19 09:57:29.194: STP: enc 01 00 0C CC CC CD 00 08 32 48 AD 1C 00 32 AA AA 03 00 00 0C 01 0B
Aug 19 09:57:29.194: STP: Data 00000000018000345DA803D3E900000028801400083248AD00801C0A00140002000F00
Aug 19 09:57:29.194: STP: VLAN0020 Gi1/0/50:0000 00 00 01 8000345DA803D3E9 00000028 801400083248AD00 801C 0A00 1400 0200 0F00
Aug 19 09:57:29.198: STP(20) port Gi1/0/50 supersedes 0
Aug 19 09:57:29.198: STP: opt: VLAN0020: get ports: no free chunk available
Aug 19 09:57:29.198: STP SW: TX: 0180.c200.0000<-0008.3249.0581 type/len 0026
Aug 19 09:57:29.198: encap SAP linktype ieee-st vlan 20 len 60 on v20 Gi1/0/1
Aug 19 09:57:29.198: 42 42 03 SPAN
Aug 19 09:57:29.198: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 0000002C
Aug 19 09:57:29.198: B:8014 0008.3249.0580 80.01 A:0B00 M:1400 H:0200 F:0F00
Aug 19 09:57:29.198: STP: VLAN0020 Gi1/0/1 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 0000002C 8014000832490580 8001 0B00 1400 0200 0F00
Aug 19 09:57:29.198: STP SW: TX: 0180.c200.0000<-0008.3249.0582 type/len 0026
Aug 19 09:57:29.198: encap SAP linktype ieee-st vlan 20 len 60 on v20 Gi1/0/2
Aug 19 09:57:29.198: 42 42 03 SPAN
Aug 19 09:57:29.198: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 0000002C
Aug 19 09:57:29.198: B:8014 0008.3249.0580 80.02 A:0B00 M:1400 H:0200 F:0F00
Aug 19 09:57:29.198: STP: VLAN0020 Gi1/0/2 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 0000002C 8014000832490580 8002 0B00 1400 0200 0F00
Aug 19 09:57:29.198: STP SW: TX: 0180.c200.0000<-0008.3249.0585 type/len 0026
Aug 19 09:57:29.198: encap SAP linktype ieee-st vlan 20 len 60 on v20 Gi1/0/5
Aug 19 09:57:29.198: 42 42 03 SPAN
Aug 19 09:57:29.198: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 0000002C
Aug 19 09:57:29.198: B:8014 0008.3249.0580 80.05 A:0B00 M:1400 H:0200 F:0F00
Aug 19 09:57:29.198: STP: VLAN0020 Gi1/0/5 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 0000002C 8014000832490580 8005 0B00 1400 0200 0F00
Aug 19 09:57:29.198: STP SW: TX: 0100.0ccc.cccd<-0008.3249.05b0 type/len 0032
Aug 19 09:57:29.198: encap SNAP linktype sstp vlan 20 len 64 on v20 Gi1/0/48
Aug 19 09:57:29.198: AA AA 03 00000C 010B SSTP
Aug 19 09:57:29.198: CFG P:0000 V:00 T:00 F:01 R:8000 345d.a803.d3e9 0000002C
Aug 19 09:57:29.198: B:8014 0008.3249.0580 80.30 A:0B00 M:1400 H:0200 F:0F00
Aug 19 09:57:29.201: T:0000 L:0002 D:0014
Aug 19 09:57:29.201: STP: VLAN0020 Gi1/0/48 tx BPDU: config protocol=ieee
Data : 0000 00 00 01 8000345DA803D3E9 0000002C 8014000832490580 8030 0B00 1400 0200 0F00
Aug 19 09:57:29.932: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:29.932: encap SNAP linktype sstp vlan 10 len 64 on v10 Gi1/0/50
Aug 19 09:57:29.932: AA AA 03 00000C 010B SSTP
Aug 19 09:57:29.932: CFG P:0000 V:00 T:00 F:00 R:800A 0008.3248.ad00 00000000
Aug 19 09:57:29.932: B:800A 0008.3248.ad00 80.1C A:0000 M:1400 H:0200 F:0F00
Aug 19 09:57:29.932: T:0000 L:0002 D:000A
Aug 19 09:57:29.935: STP SW: PROC RX: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:29.935: encap SNAP linktype sstp vlan 10 len 64 on v10 Gi1/0/50
Aug 19 09:57:29.935: AA AA 03 00000C 010B SSTP
Aug 19 09:57:29.935: CFG P:0000 V:00 T:00 F:00 R:800A 0008.3248.ad00 00000000
Aug 19 09:57:29.935: B:800A 0008.3248.ad00 80.1C A:0000 M:1400 H:0200 F:0F00
Aug 19 09:57:29.935: T:0000 L:0002 D:000A
Aug 19 09:57:29.935: STP: VLAN0010 rx BPDU: config protocol = ieee, packet from GigabitEthernet1/0/50 , linktype SSTP , enctype 3, encsize 22
Aug 19 09:57:29.935: STP: enc 01 00 0C CC CC CD 00 08 32 48 AD 1C 00 32 AA AA 03 00 00 0C 01 0B
Aug 19 09:57:29.935: STP: Data 0000000000800A00083248AD0000000000800A00083248AD00801C0000140002000F00
Aug 19 09:57:29.935: STP: VLAN0010 Gi1/0/50:0000 00 00 00 800A00083248AD00 00000000 800A00083248AD00 801C 0000 1400 0200 0F00
Aug 19 09:57:29.935: STP(10) port Gi1/0/50 supersedes 0
Aug 19 09:57:29.935: STP: opt: VLAN0010: get ports: no free chunk available
Aug 19 09:57:29.935: STP SW: TX: 0100.0ccc.cccd<-0008.3249.05b0 type/len 0032
Aug 19 09:57:29.935: encap SNAP linktype sstp vlan 10 len 64 on v10 Gi1/0/48
Aug 19 09:57:29.935: AA AA 03 00000C 010B SSTP
Aug 19 09:57:29.935: CFG P:0000 V:00 T:00 F:00 R:800A 0008.3248.ad00 00000004
Aug 19 09:57:29.935: B:800A 0008.3249.0580 80.30 A:0100 M:1400 H:0200 F:0F00
Aug 19 09:57:29.939: T:0000 L:0002 D:000A
Aug 19 09:57:29.939: STP: VLAN0010 Gi1/0/48 tx BPDU: config protocol=ieee
Data : 0000 00 00 00 800A00083248AD00 00000004 800A000832490580 8030 0100 1400 0200 0F00
Aug 19 09:57:30.306: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:30.306: encap SNAP linktype sstp vlan 80 len 64 on v80 Gi1/0/50
Aug 19 09:57:30.306: AA AA 03 00000C 010B SSTP
Aug 19 09:57:30.306: CFG P:0000 V:00 T:00 F:00 R:8000 cc9c.3e7a.2191 00000020
Aug 19 09:57:30.306: B:8050 0008.3248.ad00 80.1C A:0800 M:1400 H:0200 F:0F00
Aug 19 09:57:30.306: T:0000 L:0002 D:0050
Aug 19 09:57:30.306: STP SW: PROC RX: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:30.306: encap SNAP linktype sstp vlan 80 len 64 on v80 Gi1/0/50
Aug 19 09:57:30.306: AA AA 03 00000C 010B SSTP
Aug 19 09:57:30.306: CFG P:0000 V:00 T:00 F:00 R:8000 cc9c.3e7a.2191 00000020
Aug 19 09:57:30.306: B:8050 0008.3248.ad00 80.1C A:0800 M:1400 H:0200 F:0F00
Aug 19 09:57:30.306: T:0000 L:0002 D:0050
Aug 19 09:57:30.306: STP: VLAN0080 rx BPDU: config protocol = ieee, packet from GigabitEthernet1/0/50 , linktype SSTP , enctype 3, encsize 22
Aug 19 09:57:30.306: STP: enc 01 00 0C CC CC CD 00 08 32 48 AD 1C 00 32 AA AA 03 00 00 0C 01 0B
Aug 19 09:57:30.306: STP: Data 00000000008000CC9C3E7A219100000020805000083248AD00801C0800140002000F00
Aug 19 09:57:30.309: STP: VLAN0080 Gi1/0/50:0000 00 00 00 8000CC9C3E7A2191 00000020 805000083248AD00 801C 0800 1400 0200 0F00
Aug 19 09:57:30.309: STP(80) port Gi1/0/50 supersedes 0
Aug 19 09:57:30.309: STP: opt: VLAN0080: get ports: no free chunk available
Aug 19 09:57:30.309: STP SW: TX: 0100.0ccc.cccd<-0008.3249.05b0 type/len 0032
Aug 19 09:57:30.309: encap SNAP linktype sstp vlan 80 len 64 on v80 Gi1/0/48
Aug 19 09:57:30.309: AA AA 03 00000C 010B SSTP
Aug 19 09:57:30.309: CFG P:0000 V:00 T:00 F:00 R:8000 cc9c.3e7a.2191 00000024
Aug 19 09:57:30.309: B:8050 0008.3249.0580 80.30 A:0900 M:1400 H:0200 F:0F00
Aug 19 09:57:30.309: T:0000 L:0002 D:0050
Aug 19 09:57:30.309: STP: VLAN0080 Gi1/0/48 tx BPDU: config protocol=ieee
Data : 0000 00 00 00 8000CC9C3E7A2191 00000024 8050000832490580 8030 0900 1400 0200 0F00
Aug 19 09:57:30.543: STP SW: RX ISR: 0100.0ccc.cccd<-0008.3248.ad1c type/len 0032
Aug 19 09:57:30.543: encap SNAP linktype sstp vlan 60 len 64 on v60 Gi1/0/50
Aug 19 09:57:30.543: AA AA 03 00000C 010B SSTP
Aug 19 09:57:30.543: CFG P:0000 V:00 T:00 F:00 R:803C 0008.3248.8580 00000014
Aug 19 09:57:30.543: B:803C 0008.3248.ad00 80.1C A:0500 M:1400 H:0200 F:0F00
Aug 19 09:57:30.543: T:0000 L:0002 D:003C

[Flavio Miranda]

Hi @neeraj_dabas was those logs collected while the port was in trunk?

You are running spanning-tree MST on cisco side, which spanning-tree are you running on the other side? 

It can be spanning-tree mismatch.

[neeraj_dabas]

"Hi @neeraj_dabas was those logs collected while the port was in trunk?"
Yes
On HP side no STP is enabled.

[MHM Cisco World]

I SEND YOU MESSAGE CHECK IT

[balaji.bandi]

is the only port connect to Cisco and HP switch ? Cisco port 51  - can you post show version and can you post show run interface x/x from cisco

show vlan

show spann brief

look below example help you between cisco and hp Trunk :

https://www.petenetlive.com/KB/Article/0000741

what logs you see on the cisco device ?

[neeraj_dabas]

PROD_RACK-3-SW1#sh run interface gi1/0/51
Building configuration...

Current configuration : 90 bytes
!
interface GigabitEthernet1/0/51
switchport access vlan 30
switchport mode access
end

------------------

PROD_RACK-3-SW1#sh spann bridge

Hello Max Fwd
Vlan Bridge ID Time Age Dly Protocol
---------------- --------------------------------- ----- --- --- --------
VLAN0001 32769 (32768, 1) 0008.3249.0580 2 20 15 ieee
VLAN0010 32778 (32768, 10) 0008.3249.0580 2 20 15 ieee
VLAN0020 32788 (32768, 20) 0008.3249.0580 2 20 15 ieee
VLAN0030 32798 (32768, 30) 0008.3249.0580 2 20 15 ieee
VLAN0060 32828 (32768, 60) 0008.3249.0580 2 20 15 ieee
VLAN0080 32848 (32768, 80) 0008.3249.0580 2 20 15 ieee

--------------------

PROD_RACK-3-SW1#sh vlan

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi1/0/47, Gi1/0/49, Gi1/0/52
10 Server_Vlan active
20 Production_Vlan active Gi1/0/1, Gi1/0/2, Gi1/0/3
Gi1/0/4, Gi1/0/5, Gi1/0/6
Gi1/0/7, Gi1/0/8, Gi1/0/9
Gi1/0/10, Gi1/0/11, Gi1/0/12
Gi1/0/13, Gi1/0/14, Gi1/0/15
Gi1/0/16, Gi1/0/17, Gi1/0/18
Gi1/0/19, Gi1/0/20, Gi1/0/21
Gi1/0/22, Gi1/0/23, Gi1/0/24
30 Office_Vlan active Gi1/0/25, Gi1/0/26, Gi1/0/27
Gi1/0/28, Gi1/0/29, Gi1/0/30
Gi1/0/31, Gi1/0/32, Gi1/0/33
Gi1/0/34, Gi1/0/35, Gi1/0/36
Gi1/0/37, Gi1/0/38, Gi1/0/39
Gi1/0/40, Gi1/0/41, Gi1/0/42
Gi1/0/43, Gi1/0/44, Gi1/0/45
Gi1/0/46, Gi1/0/51
60 Management_Vlan active
80 WIFI_Vlan active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
10 enet 100010 1500 - - - - - 0 0
20 enet 100020 1500 - - - - - 0 0
30 enet 100030 1500 - - - - - 0 0
60 enet 100060 1500 - - - - - 0 0
80 enet 100080 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0


--------------------
HP switch

Dojo-Room# sh spanning-tree detail

Multiple Spanning Tree (MST) Information

STP Enabled : No

--------------------------------
cisco show version

PROD_RACK-3-SW1#sh version
Cisco IOS Software, C2960X Software (C2960X-UNIVERSALK9-M), Version 15.2(2)E6, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2016 by Cisco Systems, Inc.
Compiled Fri 16-Dec-16 21:27 by prod_rel_team

ROM: Bootstrap program is C2960X boot loader
BOOTLDR: C2960X Boot Loader (C2960X-HBOOT-M) Version 15.2(3r)E1, RELEASE SOFTWARE (fc1)

PROD_RACK-3-SW1 uptime is 10 weeks, 6 days, 20 hours, 31 minutes
System returned to ROM by power-on
System restarted at 14:02:17 UTC Sat Jun 3 2023
System image file is "flash:/c2960x-universalk9-mz.152-2.E6/c2960x-universalk9-mz.152-2.E6.bin"
Last reload reason: power-on

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

cisco WS-C2960X-48TS-L (APM86XXX) processor (revision A0) with 524288K bytes of memory.
Processor board ID JIN2129102X
Last reset from power-on
6 Virtual Ethernet interfaces
1 FastEthernet interface
52 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : 00:08:32:49:05:80
Motherboard assembly number : 73-16693-05
Power supply part number : 341-0537-02
Motherboard serial number : JPI212802NZ
Power supply serial number : LIT21132MCL
Model revision number : A0
Motherboard revision number : B0
Model number : WS-C2960X-48TS-IN
Daughterboard assembly number : 73-14200-03
Daughterboard serial number : JPI212800ZR
System serial number : JIN2129102X
Top Assembly Part Number : 68-101214-01
Top Assembly Revision Number : C0
Version ID : V01
Daughterboard revision number : B0
Hardware Board Revision Number : 0x19

Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 52 WS-C2960X-48TS-L 15.2(2)E6 C2960X-UNIVERSALK9-M

Configuration register is 0xF

[neeraj_dabas]

Hello everyone here are some findings on this issue, please have a look and suggest.
issue is same, after making port 51 trunk hp switch gone.
but status of port 51 is FWD and no port is blocked on cisco switch, please correct me if I misunderstood something.

PROD_RACK-3-SW1(config-if)#switchport mode trunk
PROD_RACK-3-SW1(config-if)#switchport nonegotiate
PROD_RACK-3-SW1#sh spanning-tree interface g1/0/51

Vlan Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
VLAN0001 Desg FWD 4 128.51 P2p
VLAN0010 Desg FWD 4 128.51 P2p
VLAN0020 Desg FWD 4 128.51 P2p
VLAN0030 Desg FWD 4 128.51 P2p
VLAN0060 Desg FWD 4 128.51 P2p
VLAN0080 Desg FWD 4 128.51 P2p
--------------

PROD_RACK-3-SW1#sh spanning-tree interface g1/0/50

Vlan Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
VLAN0001 Root FWD 4 128.50 P2p
VLAN0010 Root FWD 4 128.50 P2p
VLAN0020 Root FWD 4 128.50 P2p
VLAN0030 Root FWD 4 128.50 P2p
VLAN0060 Root FWD 4 128.50 P2p
VLAN0080 Root FWD 4 128.50 P2p
-------

PROD_RACK-3-SW1#sh spanning-tree blockedports

Name Blocked Interfaces List
-------------------- ------------------------------------

Number of blocked ports (segments) in the system : 0

--------------------
----------------
--------------
One more point - 
On same cisco switch we had port 52 already configured as trunk port and nothing is connected on that port, so we tried to connect HP switch to port 52 instead of port 51, but still result is same.

[KJK99]

@neeraj_dabas 

“On HP switch we need only two VLANs 30 and 80, so we configured accordingly, port 27 is tagged under both VLANs. Cisco port 51 is an access port and we passed vlan 30 on that port, everything working well in this scenario.”

I wonder how exactly you have run that test? Also, was Port 27 still untagged in VLAN 1? That’s a default setting. If Port 51 was an access port in VLAN 30, traffic coming out of it would be untagged and it would be the VID of Port 27 that would tell the HP switch which VLAN the traffic belonged to. So, what’s that VID and, again, how exactly did you run that test?

“But as per our requirement we need VLAN 80 too on HP switch, so the issue is whenever we convert Cisco port 51 to trunk , the link between cisco and HP drops, we lose access to HP switch and devices behind that switch.”

If the configuration of a trunk port is not additionally modified, the port is a member of all VLANs and it is tagged in all VLANs except for the native VLAN where it is untagged. If neither VLAN 30 or 80 are native on that CISCO switch, their traffic leaving the switch would be tagged with corresponding VIDs and the HP switch should have no issue with placing it in the correct VLAN and sending it to devices connected to it. If that does not work with Port 27 configured as you described, there may be some issue with the VLAN configuration of the ports those devices are connected to. I wonder how did you configure them?

[neeraj_dabas]

"I wonder how exactly you have run that test? Also, was Port 27 still untagged in VLAN 1? That’s a default setting. If Port 51 was an access port in VLAN 30, traffic coming out of it would be untagged and it would be the VID of Port 27 that would tell the HP switch which VLAN the traffic belonged to. So, what’s that VID and, again, how exactly did you run that test?"

Yes Port 27 on HP switch is untagged in VLAN 1, as it's a default setting.
Port 1-20, 23-28  Untagged in VLAN 1
Port 21-22 Untagged in VLAN 80
Port 27 tagged in VLAN 30, 80

STP is disabled on HP switch.

-- On Cisco port 51 is access port under vlan 30 as of now, we need to make it trunk, but when we change it's mode , we lose hp switch but status of 51 is FWD when I checked by "sh spanning-tree interface g1/0/51"

No. of blockedports are also 0, checked by - sh spanning-tree blockedports
These all steps are executed when 51 is an trunk port.

[Giuseppe Larosa]

Hello @neeraj_dabas ,

check on HP switch on which VLAN you have configured the management IP address I suspect it is configured under Vlan 1 and if this is true this is the reason why when you change from mode access vlan 30 to mode trunk on Cisco side you are losing the HP switch.

In access mode you can have a mismatch on VLANs used on the two sides, in trunk mode both sides must agree on what VLANs are allowed on the trunk,  and what is the native VLAN.

Hope to help

Giuseppe

[neeraj_dabas]

Hello @Giuseppe Larosa thanks, yes you are correct we configured IP address on VLAN1 only, now I assign IP address to VLAN 30 also but this will also not working, after changing from access vlan 30 to trunk on cisco side we neither able to access from vlan 1 IP nor by VLAN 30 IP address.
Vlan 1 is native VLAN for both cisco and hp.