BGP lag

[Bab L]

Hi.

We have a vrfs and BGP configured on a 4500 switch.

There is always a lag when access layer switches ping anohter access layer switch. Usually the first ping is missing.

Is there anything specific that we need to do? 

In the MGMT-VRF we ping 172.17.1.x addresses to each other and thats where the lag is.

Config:

Here is config:

!
!
ip vrf B-VRF
rd 302:1
route-target export 302:1
route-target import 305:1
route-target import 308:1
route-target import 301:1
route-target import 309:1
!
ip vrf E-VRF
rd 307:1
!
ip vrf F-VRF
rd 305:1
route-target export 305:1
route-target import 302:1
route-target import 309:1
!
ip vrf L-VRF
rd 304:1
!
ip vrf MGMT-VRF
rd 301:1
route-target export 301:1
route-target import 302:1
route-target import 308:1
route-target import 309:1
!
ip vrf P-VRF
rd 306:1
!
ip vrf PW-VRF
rd 303:1
!
ip vrf S-VRF
rd 308:1
route-target export 308:1
route-target import 302:1
route-target import 305:1
route-target import 301:1
route-target import 309:1
!
ip vrf TEMP-VRF
rd 309:1
route-target export 309:1
route-target import 305:1
route-target import 308:1
route-target import 301:1
route-target import 302:1

interface Vlan301
description MGMT-VRF
ip vrf forwarding MGMT-VRF
ip address 172.17.1.1 255.255.255.0
!
interface Vlan302
ip vrf forwarding B-VRF
ip address 172.17.2.1 255.255.255.0
!
interface Vlan303
ip vrf forwarding B-VRF
ip address 172.17.3.1 255.255.255.0
!
interface Vlan304
ip vrf forwarding B-VRF
ip address 172.17.4.1 255.255.255.0
!
interface Vlan305
no ip address
!


interface Vlan325
ip vrf forwarding F-VRF
ip address 172.17.25.1 255.255.255.0
!
interface Vlan900
ip vrf forwarding TEMP-VRF
ip address 192.168.100.211 255.255.255.0
!
router bgp 1
bgp log-neighbor-changes
!
address-family ipv4 vrf B-VRF
redistribute connected
redistribute static
exit-address-family
!
address-family ipv4 vrf F-VRF
redistribute connected
redistribute static
exit-address-family
!
address-family ipv4 vrf MGMT-VRF
redistribute connected
redistribute static
exit-address-family
!
address-family ipv4 vrf S-VRF
redistribute connected
redistribute static
exit-address-family
!
address-family ipv4 vrf TEMP-VRF
redistribute connected
redistribute static
exit-address-family

[Reza Sharifi]

Hi,

This happens only when you are pinging mgmt interfaces?

Can you provide the output when it happens?

HTH

[Bab L]

Hi.

Theres no output.

When you ping form desktop doesn't ping.

Then you ping from core to access and ping works.

Then ping starts working from desktop as well.

[Reza Sharifi]

Can you provide a sample of config from one of the access switches and the core?

[Bab L]

Thanks all.

We just removed the vrfs for now and solved the issue.