7206 is connected to L3 Switch directly and some other port of router 7206 are connected to the same layer 3 switch.i am getting error for each subnets connected over different ports of 7206. And the same error i am getting over 6509 switch.

Then mostly the ports connecting to the 6509 switch would be in a common vlan (need not be common subnet) and hence in a common Broadcast domain

HTH

Narayan

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The topology is as below

7206------->6509 like the same three ports are connected to the switch.

6509 Switch port config.

interface GigabitEthernet0/1.16

encapsulation dot1Q 16

ip address 172.19.242.217 255.255.255.252

ip access-group MPLSFILTERINBOUNDTRAFFIC in

no ip redirects

no ip unreachables

no ip proxy-arp

arp timeout 900

no cdp enable

and the 7206 end id having the 218 IP,

please tell what is the issue and how to reolve this.

can you please post the configs of all the 3 ports

Narayan

7206 port config

interface FastEthernet1/0

description *** To CPX11-6509 ***

ip address 172.19.242.218 255.255.255.252

duplex auto

speed auto

no cdp enable

!

interface FastEthernet1/1

ip address 172.19.242.222 255.255.255.252

duplex auto

speed auto

no cdp enable

Sorry i was not specific, i would like the switch side port configurations

Narayan

Narayan,

The other end config is same as i send earlier for G0/1.16 omly the ip is different,

Please help why this error comes and what could ne the solution

Narayan,

Sorry for disturbing u. Looking for solid update.

I am finding it difficult to understand the connectivity. If they are directly connected, why are you using subinterfaces?

THe config would make sense if the topology was 72xx --- SW--dot1q---65xx. You also say that the configs are similar on all the 3 ports which raises another doubt. The vlan associated with each subinterface should mostly be different

It would be better if you post your topology and the complete configs

Narayan

Abhay

I wonder if it is possible that you have a cable cross connected so that the 7206 is not connected to what you think it is connected to. Can you trace the cables and verify the connections?

It is unfortunate that you have CDP disabled as this is a very good way to check for this kind of problem. Would it be possible to enable CDP on these interfaces and then to post the output of show cdp neighbor detail?

Could you also post the error message again being very specific about the interface on which the message is generated and posting that interface config again so that we can be very clear about this?

HTH

Rick