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Cannot pass Vlan traffic between 2960x and SG300

b.tahmasebi
Level 1
Level 1

‎05-14-2016 02:25 PM - last edited on ‎03-25-2019 04:38 PM by Community Manager

Hello,

I have 2 switches 2960x and 2 SG300-28

I create vtp between my 2960 and every things is okay... And in SG300 create manually vlans exactly like name and ID in 2960 and enable GRVP in SG300, but cannot pass traffic between them, my uplinks are Trunk, 

I have pinged in vlan 28 in 2960 switches 

And I have like this vlan 28 in SG300, but I cannot ping my host in other side(in SG300)...

I set IP on every switch (vlan1)...

2960-01 > 192.168.2.230

2960-02 > 192.168.2.231

SG300-01 > 192.168.2.232

SG300-02 > 192.168.2.233

And I don't have any restricting on switch...

I reset factory all my switch... And I set just ssh and vtp and vlans...

I'm confused... I did this one time and worked good, but when I reset factory and configured again, but work not at all... 

Labels:
0 Helpful
9 Replies 9

Borgenstrand
Level 1
Level 1

‎05-15-2016 12:27 AM

Hi,

on 2960x switches, can you write switchport nonegotiate on the trunk ports? It could be DTP causing the issue. The interfaces on SG300, are they hardcoded to be trunks?

0 Helpful

b.tahmasebi
Level 1
Level 1
In response to Borgenstrand

‎05-15-2016 01:26 AM

Dear Friend,

I did that (switchport nonegotiate) on every uplinks, can you explain about hardcoded in SG300...?

Thanks,

0 Helpful

Borgenstrand
Level 1
Level 1
In response to b.tahmasebi

‎05-15-2016 01:29 AM

Hi, sorry, i was not clear enough. Hardcoded I meant manually, DTP in Cisco switches can cause them to think that a trunk port should be an access port hence, making them into access ports even though it is connected to another switch and should be an trunk port.

Now that you have done nonegotiate, is it still not forming trunks?

0 Helpful

b.tahmasebi
Level 1
Level 1
In response to Borgenstrand

‎05-15-2016 05:09 AM

Dear Borgen this info about my ports

2960-01

Name: Gi1/0/28

Switchport: Enabled

Administrative Mode: trunk

Operational Mode: trunk

Administrative Trunking Encapsulation: dot1q

Operational Trunking Encapsulation: dot1q

Negotiation of Trunking: Off

Access Mode VLAN: 1 (default)

Trunking Native Mode VLAN: 1 (default)

Administrative Native VLAN tagging: enabled

Voice VLAN: none

Administrative private-vlan host-association: none 

Administrative private-vlan mapping: none 

Administrative private-vlan trunk native VLAN: none

Administrative private-vlan trunk Native VLAN tagging: enabled

Administrative private-vlan trunk encapsulation: dot1q

Administrative private-vlan trunk normal VLANs: none

Administrative private-vlan trunk associations: none

Administrative private-vlan trunk mappings: none

Operational private-vlan: none

Trunking VLANs Enabled: ALL

Pruning VLANs Enabled: 2-1001

Capture Mode Disabled

Capture VLANs Allowed: ALL

Protected: false

Unknown unicast blocked: disabled

Unknown multicast blocked: disabled

Appliance trust: none

2960-02

Administrative Mode: trunk

Operational Mode: trunk

Administrative Trunking Encapsulation: dot1q

Operational Trunking Encapsulation: dot1q

Negotiation of Trunking: Off

Access Mode VLAN: 1 (default)

Trunking Native Mode VLAN: 1 (default)

Administrative Native VLAN tagging: enabled

Voice VLAN: none

Administrative private-vlan host-association: none 

Administrative private-vlan mapping: none 

Administrative private-vlan trunk native VLAN: none

Administrative private-vlan trunk Native VLAN tagging: enabled

Administrative private-vlan trunk encapsulation: dot1q

Administrative private-vlan trunk normal VLANs: none

Administrative private-vlan trunk associations: none

Administrative private-vlan trunk mappings: none

Operational private-vlan: none

Trunking VLANs Enabled: ALL

Pruning VLANs Enabled: 2-1001

Capture Mode Disabled

Capture VLANs Allowed: ALL

Protected: false

Unknown unicast blocked: disabled

Unknown multicast blocked: disabled

Appliance trust: none

SG300

Added by: D-Default, S-Static, G-GVRP, R-Radius Assigned VLAN, T-Guest VLAN, V-Voice VLAN

Port : gi27

Port Mode: Trunk

Gvrp Status: enabled

Ingress Filtering: true

Acceptable Frame Type: admitAll

Ingress UnTagged VLAN ( NATIVE ): 1

Port is member in: 

Vlan               Name               Egress rule     Added by     

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

 1                  1                  Untagged          V

0 Helpful

Borgenstrand
Level 1
Level 1
In response to b.tahmasebi

‎05-15-2016 07:58 AM

Hi,

can you run show interface trunk on the 2960 switches?

Please run show cdp neighbor as well.

0 Helpful

b.tahmasebi
Level 1
Level 1
In response to Borgenstrand

‎05-16-2016 02:14 AM

Hi,

Now, I found my problem, I joined interface 27(uplink to 2960-01) on SG300 to vlan 28 and I can ping it , but just in 2960-01 can ping that vlan, but every 2 switch 2960 are vtp but in 2960-02 can not ping that host in sg300...!

sh cdp neig...

Device ID        Local Intrfce     Holdtme    Capability  Platform  Port ID

0cf5a4c72d87     Gig 1/0/25        145              S I   SG300-28P gi27

SW-Core-02.Perla Fas 0             161              S I   WS-C2960X Fas 0

SW-Core-02.Perla Gig 1/0/28        136              S I   WS-C2960X Gig 1/0/28

b07d47830abc     Gig 1/0/26        144             R S I  SG300-28P gi27

Total cdp entries displayed : 4

2960-01

Port        Mode             Encapsulation  Status        Native vlan

Gi1/0/25    on               802.1q         trunking      1

Gi1/0/26    on               802.1q         trunking      1

Gi1/0/28    on               802.1q         trunking      1

Port        Vlans allowed on trunk

Gi1/0/25    1-4094

Gi1/0/26    1-4094

Gi1/0/28    1-4094

Port        Vlans allowed and active in management domain

Gi1/0/25    1,28

Gi1/0/26    1,28

Gi1/0/28    1,28

Port        Vlans in spanning tree forwarding state and not pruned

Gi1/0/25    1,28

Gi1/0/26    1,28

Gi1/0/28    1,28

 

2960-02

Port        Mode             Encapsulation  Status        Native vlan

Gi1/0/28    on               802.1q         trunking      1

Port        Vlans allowed on trunk

Gi1/0/28    1-4094

Port        Vlans allowed and active in management domain

Gi1/0/28    1,28

Port        Vlans in spanning tree forwarding state and not pruned

Gi1/0/28    1,28

VTP Server on 2960-01

VTP Version capable             : 1 to 3

VTP version running             : 2

VTP Domain Name                 : Perla

VTP Pruning Mode                : Enabled

VTP Traps Generation            : Disabled

Device ID                       : 0c11.67c0.6680

Configuration last modified by 192.168.2.230 at 5-16-16 08:12:44

Local updater ID is 192.168.2.230 on interface Vl1 (lowest numbered VLAN interface found)

Feature VLAN:

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

VTP Operating Mode                : Server

Maximum VLANs supported locally   : 1005

Number of existing VLANs          : 6

Configuration Revision            : 3

MD5 digest                        : 0xAF 0xB1 0x4E 0x87 0x08 0xCD 0xE1 0x6C 

                                    0x43 0xAF 0x95 0x26 0x9E 0x7F 0x7B 0xE3 

VTP client on 2960-02

VTP Version capable             : 1 to 3

VTP version running             : 2

VTP Domain Name                 : Perla

VTP Pruning Mode                : Enabled

VTP Traps Generation            : Disabled

Device ID                       : 80e8.6f09.0e00

Configuration last modified by 192.168.2.230 at 5-16-16 08:12:44

Feature VLAN:

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

VTP Operating Mode                : Client

Maximum VLANs supported locally   : 1005

Number of existing VLANs          : 6

Configuration Revision            : 3

MD5 digest                        : 0xAF 0xB1 0x4E 0x87 0x08 0xCD 0xE1 0x6C 

                                    0x43 0xAF 0x95 0x26 0x9E 0x7F 0x7B 0xE3

0 Helpful

Borgenstrand
Level 1
Level 1
In response to b.tahmasebi

‎05-16-2016 07:26 AM

Can you disable VTP Pruning? I wonder if that causes the issues, I do not think that SG300 can handle VTP.

Is it only Vlan 1 and 28 you are using?

0 Helpful

b.tahmasebi
Level 1
Level 1
In response to Borgenstrand

‎05-18-2016 10:36 AM

Hi... I reset factory and set again... every things works good...

Thank You for your Help...

0 Helpful

Borgenstrand
Level 1
Level 1
In response to b.tahmasebi

‎05-18-2016 10:39 AM

Hi,

You are welcome, very good it works for you now. 

Please rate and close this thread :)

0 Helpful
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