SG200 to 2960s Vlan Configuration

[bperkola1]

I am having trouble getting VLANs setup between SG200 and 2960s switches.

I have several other switches (different manufactures) that are working just fine in the same configuration.

The topology is: Router -> 2960 -> SG200.

The router has interfaces defined for each vlan.

2960 Configuration is:

** Router Connection **

switchport trunk allowed vlan 1-3

switchport mode trunk

** SG200 connection **

switchport trunk allowed vlan 1-3

switchport mode trunk

On the SG200

I have port GE1 defined as 3UP

I have port GE26 defined as 1UP, 2T,3T

From the SG200 I can ping the Router's vlan gateway address.

I cannot ping the Router's vlan gateway address from a PC connected to port 1.

Not sure what I am missing. Any assistance would be greatly appreciated.

[Richard Burts]

Can you verify that on SG200 port GE26 connects to the 2960?

Can you post the output of show interface trunk from the 2960?

Can you post the output of show ip interface brief from the 2960?

Can you tell us from the PC what is IP, mask, and gateway?

Can you post the output of show arp (or perhaps show ip arp) from the 2960?

HTH

Rick

[bperkola1]

Yes, I can connect to the SG200 through the 2960. I am able to reach the web configuration console.

Interface Trunk (Relevant ports to connection)

Port Mode Encapsulation Status Native vlan
Gi2/0/8 on 802.1q trunking 1
Po6 on 802.1q trunking 1

Port Vlans allowed on trunk
Gi2/0/8 1-3
Po6 1-3,10,30,85,252

Port Vlans allowed and active in management domain
Gi2/0/8 1-2
Po6 1-2,10,30,85

Port Vlans in spanning tree forwarding state and not pruned
Gi2/0/8 1-2
Po6 1-2,10,30,85

Interface Brief (striped to relevant ports)

Interface IP-Address OK? Method Status Protocol
Vlan1 192.168.0.161 YES NVRAM up up
FastEthernet0 unassigned YES NVRAM down down
GigabitEthernet1/0/1 unassigned YES unset up up
GigabitEthernet2/0/1 unassigned YES unset up up
GigabitEthernet2/0/8 unassigned YES unset up up
Port-channel6 unassigned YES unset up up

The subnet for the VLAN is 172.20.2.X. 

PC IP Address (172.20.2.220\24, GW 172.20.2.254)

ARP

Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.0.122 2 0050.5692.21e9 ARPA Vlan1
Internet 192.168.0.118 0 0050.5692.bca6 ARPA Vlan1
Internet 192.168.0.50 0 0017.c565.c4ca ARPA Vlan1
Internet 192.168.0.1 230 2894.0f32.e062 ARPA Vlan1
Internet 192.168.0.21 1 3417.ebc6.4563 ARPA Vlan1
Internet 192.168.0.253 123 0830.6b34.9400 ARPA Vlan1
Internet 192.168.0.254 0 0830.6b34.9430 ARPA Vlan1
Internet 192.168.0.160 133 64d9.89cb.9938 ARPA Vlan1
Internet 192.168.0.161 - c40a.cbb6.df40 ARPA Vlan1

Thanks for any advice you can offer.

Bryan

[Richard Burts]

Bryan

Thanks for the additional information. Am I correct in understanding that the PC is connected on port 1 and that this port is assigned to vlan 3?

If so then the most significant part of what you have posted in the output of show interface trunk which shows that vlan 3 is allowed but not active on the trunk

Port Vlans allowed on trunk
Gi2/0/8 1-3
Po6 1-3,10,30,85,252

Port Vlans allowed and active in management domain
Gi2/0/8 1-2
Po6 1-2,10,30,85

We need to figure out why this is. As a starting point can you verify that SG200 configuration of vlan 3 is complete and correct? And can you verify that on 2960 that vlan 3 is configured (show vlan is a good place to start).

HTH

Rick