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Community Member

Ping packets are dropping on bridged interface

We have 2 7500 routers and 2 6500 switches for backbone network. And router and switches are connected by gigabit.

We need to dlsw connection on 7500 router so we bridged gigabit interface.

Cofiguration is as follow.

===========================================================

dlsw local-peer peer-id 10.60.19.27

dlsw remote-peer 0 tcp 10.63.1.1 lsap-output-list 200 passive

dlsw remote-peer 0 tcp 10.63.1.2 lsap-output-list 200 backup-peer 10.63.1.1 linger 1

dlsw icanreach mac-address 4110.0000.0000 mask ffff.ffff.ffff

dlsw bridge-group 1

dlsw bridge-group 2

dlsw bridge-group 16

dlsw bridge-group 18

dlsw bridge-group 19

dlsw bridge-group 20

dlsw bridge-group 59

dlsw bridge-group 60

dlsw bridge-group 61

dlsw bridge-group 62

dlsw bridge-group 63

!

!

interface Loopback0

ip address 10.63.1.12 255.255.255.255

!

interface GigabitEthernet0/0/0

ip address 10.60.100.2 255.255.255.0

ip route-cache distributed

load-interval 30

negotiation auto

!

interface GigabitEthernet1/0/0

bandwidth 1000000

no ip address

ip route-cache distributed

load-interval 30

negotiation auto

!

interface GigabitEthernet1/0/0.1

encapsulation isl 1

no ip redirects

bridge-group 1

!

interface GigabitEthernet1/0/0.2

encapsulation isl 2

no ip redirects

bridge-group 2

!

interface GigabitEthernet1/0/0.16

encapsulation isl 16

no ip redirects

bridge-group 16

!

.................................

===========================================================

The problem is that ping packets between routers and switches are dropping. (GigabitEthernet1/0/0) but there's no packet drop count on giga interface. (show interface)

We replaced GBICs on both devices already so I guess it's not about hardware problem.

So I wonder if a bridged interface can cause packet drop.

Anyway I want to know the possible causes of this problem.

1 REPLY
Community Member

Re: Ping packets are dropping on bridged interface

From your configuration on the 7500 routers, I understand that you are routing IP on this box. With this configuration, if you want to 'ping' any address on the switch, you need to configure an IP address under the sub-interface of the vlan to which the switch IP address belongs to. When you bridge IP on this box, you need to create a BVI for the corresponding bridge-group and assign an IP address to it and enable IRB. See if this link help you :

http://www.cisco.com/warp/public/473/741_10.html

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