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packet lost when ping throug VRRP interface

Publication Date:  2012-07-27 Views:  33 Downloads:  0
Issue Description
Topo is as following:
                                        |-----------Router1-----------|
LSW------(network)-----|                                            |---------PC
                                        |-----------Router2-----------|
From LSW, make VPLS to Router1 and Router2, and terminal by VE interface, in VE interface, use VRRP for protection.
When ping from LSW to PC, packet lost about 50%
Alarm Information
Null
Handling Process
By ping tool, we are sure that like before or after CX600 is no problem.
And check  the network, no loop exist
when check the VRRP configuration, we found that both are MASTER status. check detail about the configuration,There is one sub ip address configured in router1:
interface Virtual-Ethernet1/1/52.123
 qinq termination ce-vid 123
 qinq vrrp ce-vid 123
 ip binding vpn-instance NGTS-common
 ip address 10.130.77.53 255.255.255.252
 ip address 10.130.100.45 255.255.255.248 sub
 vrrp vrid 52 virtual-ip 10.130.77.53
 vrrp vrid 52 virtual-ip 10.130.100.41
 vrrp vrid 52 priority 120
 arp broadcast enable
 statistic enable
and in router2, there is no sub ip address:
interface Virtual-Ethernet1/1/52.123
 qinq termination ce-vid 123
 qinq vrrp ce-vid 123
 ip binding vpn-instance NGTS-common
 ip address 10.130.100.46 255.255.255.248
 vrrp vrid 52 virtual-ip 10.130.100.41
 vrrp vrid 52 priority 120
 arp broadcast enable
 statistic enable     
After we capture packet, we found that the hearbeating packet from Router1 to Router2 takes 10.130.77.53 as source IP address, from Router 2 to Router1 takes 10.130.100.46 as source IP address. it's in different network. as a result, both devcie are in MASTER status, and both device will send heartbeating packet to renew the MAC address in the LSW, finally,MAC flaping, ping packet lost
Root Cause
Possible reasons:
1. like problem between LSW and PC
2. loop exist
3. VRRP works abnormally
Suggestions
Null

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