Description

vme IP address is not reachable if the em0 interface is not directly connected to the master device in a VC.

Symptoms

This issue might been seen if the following conditions are meet:

VC vme port IP address
lab@EX4600-VC> show interfaces terse | match vme   
vme           up  up
vme.0          up  up  inet   x.x.45.33/26 


Standalone vme port IP address
lab@EX4600-standalone> show interfaces terse | match vme   
vme           up  up
vme.0          up  up  inet   x.x.45.34/26 
 

Situation-1

When FPC0 is Master & FPC1 is Backup
lab@EX4600-VC> show virtual-chassis
                       Mstr                                                                    Mixed   Route   Neighbor      List
Member ID   Status    Serial No     Model          prio    Role      Mode    Mode.      ID         Interface
0 (FPC 0)      Prsnt      XYZ123    ex4600-40f   129   Master*      N         VC         1        vcp-255/0/22
1 (FPC 1)      Prsnt      123XYZ    ex4600-40f   129   Backup      N         VC          0       vcp-255/0/22


lab@EX4600-VC> ping x.x.45.34 count 100 rapid 
PING 1x.x.45.34 (x.x.45.34): 56 data bytes
....................................................................................................
--- x.x.45.34 ping statistics ---
100 packets transmitted, 0 packets received, 100% packet loss

 

Situation-2

When FPC1 is Master & FPC0 is Backup
lab@EX4600-VC> show virtual-chassis
                       Mstr                                                                    Mixed   Route   Neighbor      List
Member ID   Status    Serial No     Model          prio    Role      Mode    Mode.      ID         Interface
0 (FPC 0)      Prsnt      XYZ123    ex4600-40f   129   Backup*      N         VC         1        vcp-255/0/22
1 (FPC 1)      Prsnt      123XYZ    ex4600-40f   129   Master        N         VC          0       vcp-255/0/22


lab@EX4600-VC> ping x.x.45.34 count 100 rapid 
PING x.x.45.33 (x.x.45.34): 56 data bytes
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
--- x.x.45.34 ping statistics ---
100 packets transmitted, 100 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.046/0.371/2.780/0.313 ms

Solution

We should be connecting both (Master & Backup) the em0 interfaces to reach vme interface IP address

Modification History

2023-10-17