Re: Please analyze log about STP , RSTP for C4509 switch

injaelee72786 · ‎04-08-2020

The following log occurs continuously in C4509.

I think there's a problem with STP, but I don't know what the problem is.

It occurs simultaneously with the majority of VLANs and PORTs.

I extracted some of them.

type sstp vlan 110 len 72 on v110 Gi9/48
2728370793: *Apr 8 06:47:46.978: AA AA 03 00000C 010B SSTP
2728370794: *Apr 8 06:47:46.978: CFG P:0000 V:02 T:02 F:3C R:806E 08cc.a7ed.7200 00000004
2728370795: *Apr 8 06:47:46.978: B:806E 189c.5d5e.1b40 84.30 A:0100 M:1400 H:0200 F:0F00
2728370796: *Apr 8 06:47:46.978: T:0000 L:0002 D:006E
2728370797: *Apr 8 06:47:46.978: STP SW: RX ISR: 0100.0ccc.cccd<-24e9.b3e2.4aff type/len 0032
2728370798: *Apr 8 06:47:46.978: encap SNAP linktype sstp vlan 120 len 72 on v120 Gi9/48
2728370799: *Apr 8 06:47:46.978: AA AA 03 00000C 010B SSTP
2728370800: *Apr 8 06:47:46.978: CFG P:0000 V:02 T:02 F:3C R:8078 0017.0e7a.9e00 00000004
2728370801: *Apr 8 06:47:46.978: B:8078 189c.5d5e.1b40 84.30 A:0100 M:1400 H:0200 F:0F00
2728370802: *Apr 8 06:47:46.978: T:0000 L:0002 D:0078
2728370803: *Apr 8 06:47:46.978: STP SW: PROC RX: 0100.0ccc.cccd<-24e9.b3e2.4aff type/len 0032
2728370804: *Apr 8 06:47:46.978: encap SNAP linktype sstp vlan 110 len 72 on v110 Gi9/48
2728370805: *Apr 8 06:47:46.978: AA AA 03 00000C 010B SSTP
2728370806: *Apr 8 06:47:46.978: CFG P:0000 V:02 T:02 F:3C R:806E 08cc.a7ed.7200 00000004
2728370807: *Apr 8 06:47:46.978: B:806E 189c.5d5e.1b40 84.30 A:0100 M:1400 H:0200 F:0F00
2728370808: *Apr 8 06:47:46.978: T:0000 L:0002 D:006E
2728370809: *Apr 8 06:47:46.978: STP: VLAN0110 rx BPDU: config protocol = rstp, packet from GigabitEthernet9/48 , linktype SSTP , enctype 3, encsize 22
2728370810: *Apr 8 06:47:46.978: STP: enc 01 00 0C CC CC CD 24 E9 B3 E2 4A FF 00 32 AA AA 03 00 00 0C 01 0B
2728370811: *Apr 8 06:47:46.978: STP: Data 000002023C806E08CCA7ED720000000004806E189C5D5E1B4084300100140002000F00
2728370812: *Apr 8 06:47:46.978: STP: VLAN0110 Gi9/48:0000 02 02 3C 806E08CCA7ED7200 00000004 806E189C5D5E1B40 8430 0100 1400 0200 0F00
2728370813: *Apr 8 06:47:46.978: RSTP(110): Gi9/48 repeated msg
2728370814: *Apr 8 06:47:46.978: RSTP(110): Gi9/48 rcvd info remaining 6
2728370815: *Apr 8 06:47:46.978: STP SW: PROC RX: 0100.0ccc.cccd<-24e9.b3e2.4aff type/len 0032
2728370816: *Apr 8 06:47:46.978: encap SNAP linktype sstp vlan 120 len 72 on v120 Gi9/48
2728370817: *Apr 8 06:47:46.978: AA AA 03 00000C 010B SSTP
2728370818: *Apr 8 06:47:46.978: CFG P:0000 V:02 T:02 F:3C R:8078 0017.0e7a.9e00 00000004
2728370819: *Apr 8 06:47:46.978: B:8078 189c.5d5e.1b40 84.30 A:0100 M:1400 H:0200 F:0F00
2728370820: *Apr 8 06:47:46.978: T:0000 L:0002 D:0078
2728370821: *Apr 8 06:47:46.978: STP: VLAN0120 rx BPDU: config protocol = rstp, packet from GigabitEthernet9/48 , linktype SSTP , enctype 3, encsize 22
2728370822: *Apr 8 06:47:46.978: STP: enc 01 00 0C CC CC CD 24 E9 B3 E2 4A FF 00 32 AA AA 03 00 00 0C 01 0B
2728370823: *Apr 8 06:47:46.978: STP: Data 000002023C807800170E7A9E00000000048078189C5D5E1B4084300100140002000F00
2728370824: *Apr 8 06:47:46.978: STP: VLAN0120 Gi9/48:0000 02 02 3C 807800170E7A9E00 00000004 8078189C5D5E1B40 8430 0100 1400 0200 0F00
2728370825: *Apr 8 06:47:46.978: RSTP(120): Gi9/48 repeated msg
2728370826: *Apr 8 06:47:46.978: RSTP(120): Gi9/48 rcvd info remaining 6
2728370827: *Apr 8 06:47:47.002: STP SW: RX ISR: 0100.0ccc.cccd<-2cfa.a2c9.d0ce type/len 0032
2728370828: *Apr 8 06:47:47.002: encap SNAP linktype sstp vlan 36 len 64 on v36 Te3/8
2728370829: *Apr 8 06:47:47.002: AA AA 03 00000C 010B SSTP
2728370830: *Apr 8 06:47:47.002: CFG P:0000 V:02 T:02 F:7C R:1024 2cfa.a223.27e2 00000000
2728370831: *Apr 8 06:47:47.002: B:1024 2cfa.a223.27e2 72.DE A:0000 M:1400 H:0200 F:0F00
2728370832: *Apr 8 06:47:47.002: T:0000 L:0002 D:0024
2728370833: *Apr 8 06:47:47.002: STP SW: PROC RX: 0100.0ccc.cccd<-2cfa.a2c9.d0ce type/len 0032
2728370834: *Apr 8 06:47:47.002: encap SNAP linktype sstp vlan 36 len 64 on v36 Te3/8
2728370835: *Apr 8 06:47:47.002: AA AA 03 00000C 010B SSTP
2728370836: *Apr 8 06:47:47.002: CFG P:0000 V:02 T:02 F:7C R:1024 2cfa.a223.27e2 00000000
2728370837: *Apr 8 06:47:47.002: B:1024 2cfa.a223.27e2 72.DE A:0000 M:1400 H:0200 F:0F00
2728370838: *Apr 8 06:47:47.002: T:0000 L:0002 D:0024
2728370839: *Apr 8 06:47:47.002: STP: VLAN0036 rx BPDU: config protocol = rstp, packet from TenGigabitEthernet3/8 , linktype SSTP , enctype 3, encsize 22
0 Gi9/1
2728490557: *Apr 8 06:49:39.022: AA AA 03 00000C 010B SSTP
2728490558: *Apr 8 06:49:39.022: CFG P:0000 V:02 T:02 F:3C R:8078 0017.0e7a.9e00 00000008
2728490559: *Apr 8 06:49:39.022: B:8078 189c.5d5e.1a00 84.01 A:0200 M:1400 H:0200 F:0F00
2728490560: *Apr 8 06:49:39.022: T:0000 L:0002 D:0078
2728490561: *Apr 8 06:49:39.022: RSTP(120): sending BPDU out Gi9/2
2728490562: *Apr 8 06:49:39.022: STP SW: TX: 0100.0ccc.cccd<-24e9.b3e2.58c1 type/len 0032
2728490563: *Apr 8 06:49:39.022: encap SNAP linktype sstp vlan 120 len 96 on v120 Gi9/2
2728490564: *Apr 8 06:49:39.022: AA AA 03 00000C 010B SSTP
2728490565: *Apr 8 06:49:39.022: CFG P:0000 V:02 T:02 F:3C R:8078 0017.0e7a.9e00 00000008
2728490566: *Apr 8 06:49:39.022: B:8078 189c.5d5e.1a00 84.02 A:0200 M:1400 H:0200 F:0F00
2728490567: *Apr 8 06:49:39.022: T:0000 L:0002 D:0078
2728490568: *Apr 8 06:49:39.022: RSTP(120): sending BPDU out Gi9/5
2728490569: *Apr 8 06:49:39.022: STP SW: TX: 0100.0ccc.cccd<-24e9.b3e2.58c4 type/len 0032
2728490570: *Apr 8 06:49:39.022: encap SNAP linktype sstp vlan 120 len 96 on v120 Gi9/5
2728490571: *Apr 8 06:49:39.022: AA AA 03 00000C 010B SSTP
2728490572: *Apr 8 06:49:39.022: CFG P:0000 V:02 T:02 F:3C R:8078 0017.0e7a.9e00 00000008
2728490573: *Apr 8 06:49:39.022: B:8078 189c.5d5e.1a00 84.05 A:0200 M:1400 H:0200 F:0F00
2728490574: *Apr 8 06:49:39.022: T:0000 L:0002 D:0078
2728490575: *Apr 8 06:49:39.022: RSTP(120): sending BPDU out Gi9/10
2728490576: *Apr 8 06:49:39.022: STP SW: TX: 0100.0ccc.cccd<-24e9.b3e2.58c9 type/len 0032
2728490577: *Apr 8 06:49:39.022: encap SNAP linktype sstp vlan 120 len 96 on v120 Gi9/10
2728490578: *Apr 8 06:49:39.022: AA AA 03 00000C 010B SSTP
2728490579: *Apr 8 06:49:39.022: CFG P:0000 V:02 T:02 F:3C R:8078 0017.0e7a.9e00 00000008
2728490580: *Apr 8 06:49:39.022: B:8078 189c.5d5e.1a00 84.0A A:0200 M:1400 H:0200 F:0F00
2728490581: *Apr 8 06:49:39.022: T:0000 L:0002 D:0078
2728490582: *Apr 8 06:49:39.022: RSTP(120): sending BPDU out Gi9/47
2728490583: *Apr 8 06:49:39.022: STP SW: TX: 0100.0ccc.cccd<-24e9.b3e2.58ee type/len 0032
2728490584: *Apr 8 06:49:39.022: encap SNAP linktype sstp vlan 120 len 96 on v120 Gi9/47
2728490585: *Apr 8 06:49:39.022: AA AA 03 00000C 010B SSTP
2728490586: *Apr 8 06:49:39.022: CFG P:0000 V:02 T:02 F:3C R:8078 0017.0e7a.9e00 00000008
2728490587: *Apr 8 06:49:39.022: B:8078 189c.5d5e.1a00 84.2F A:0200 M:1400 H:0200 F:0F00
2728490588: *Apr 8 06:49:39.022: T:0000 L:0002 D:0078
2728490589: *Apr 8 06:49:39.026: RSTP(130): sending BPDU out Gi1/1
2728490590: *Apr 8 06:49:39.026: STP SW: TX: 0100.0ccc.cccd<-b838.61d8.4688 type/len 0032
2728490591: *Apr 8 06:49:39.026: encap SNAP linktype sstp vlan 130 len 96 on v130 Gi1/1
2728490592: *Apr 8 06:49:39.026: AA AA 03 00000C 010B SSTP
2728490593: *Apr 8 06:49:39.026: CFG P:0000 V:02 T:02 F:3C R:8000 e8e7.326c.7e64 00000013
2728490594: *Apr 8 06:49:39.026: B:8082 189c.5d5e.1a00 80.01 A:0100 M:1400 H:0200 F:0F00
2728490595: *Apr 8 06:49:39.026: T:0000 L:0002 D:0082
2728490596: *Apr 8 06:49:39.026: RSTP(130): sending BPDU out Gi1/2
2728490597: *Apr 8 06:49:39.026: STP SW: TX: 0100.0ccc.cccd<-b838.61d8.4689 type/len 0032
2728490598: *Apr 8 06:49:39.026: encap SNAP linktype sstp vlan 130 len 96 on v130 Gi1/2
2728490599: *Apr 8 06:49:39.026: AA AA 03 00000C 010B SSTP
2728490600: *Apr 8 06:49:39.026: CFG P:0000 V:02 T:02 F:3C R:8000 e8e7.326c.7e64 00000013
2728490601: *Apr 8 06:49:39.026: B:8082 189c.5d5e.1a00 80.02 A:0100 M:1400 H:0200 F:0F00
2728490602: *Apr 8 06:49:39.026: T:0000 L:0002 D:0082
2728490603: *Apr 8 06:49:39.026: STP SW: TX: 0100.0ccc.cccd<-b838.61d8.468a type/len 0032
2728490604: *Apr 8 06:49:39.026: encap SNAP linktype sstp vlan 130 len 96 on v130 Gi1/3
2728490605: *Apr 8 06:49:39.026: AA AA 03 00000C 010B SSTP
2728490606: *Apr 8 06:49:39.026: CFG P:0000 V:00 T:00 F:00 R:8000 e8e7.326c.7e64 00000013
2728490607: *Apr 8 06:49:39.026: B:8082 189c.5d5e.1a00 80.03 A:0100 M:1400 H:0200 F:0F00

marce1000 · ‎04-08-2020

Ref : https://community.cisco.com/t5/switching/rstp-problem/td-p/1188821

On which I note the passage of Mr. Francois Tallet :

SSTP BPDUs can be flooded by non-cisco switches, or by Cisco switches with STP disabled.

Do you have any non-Cisco switch on your network?

Did you disable STP for some vlans? Be particularly careful about access vlans. Your suspect BPDUs might have been generated by a device connected to an access port in a vlan with STP disabled.

Adding : you may correlate this event to a recent network change by an ict-operator for instance, taking into account the above mentioned items.

M.

-- ' 'Good body every evening' ' this sentence was once spotted on a logo at the entrance of a Weight Watchers Club !