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VPC Gateway Redundancy with the CSR 1000v



tested vPC Gateway Redundancy feature but struggeled a bit ->

event manager environment RTB rtb-824519eb
event manager environment ENI eni-fa13f087
event manager environment CIDR
event manager environment REGION eu-central/
event manager applet replace-route2
event syslog pattern "\(Tunnel0\) is down: BFD peer down notified"
action 1.0 syslog msg "Will now change route"
action 2.0 publish-event sub-system 55 type 55 arg1 "$RTB" arg2 "$CIDR" arg3 "$ENI" arg4 "$REGION"

I tested it in Frankfurt with a vPC

The CSR had the IAM Role to "ChangeRoute"

Syslog :

*Mar 26 20:56:59.994: %BFDFSM-6-BFD_SESS_DOWN: BFD-SYSLOG: BFD session ld:4097 handle:1,is going Down Reason: ECHO FAILURE
*Mar 26 20:56:59.994: %BFD-6-BFD_SESS_DESTROYED: BFD-SYSLOG: bfd_session_destroyed, ld:4097 neigh proc:EIGRP, handle:1 act
*Mar 26 20:56:59.996: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor (Tunnel0) is down: BFD peer down notified
*Mar 26 20:56:59.996: %HA_EM-6-LOG: replace-route2: Will now change route

Can you hlep here ?


Hi, Sorry didn't see this question earlier.

Most likely you are hitting the bug CSCuy96961.

Here is the workaround:

Add the following eem to both CSR configuration and reboot the router. This should be fixed in IOS-XE 16.3.

event manager applet restart-csrmgmt
 description "disable/enable csr_mgmt after Gi1 gets DHCP IP address"
 event syslog pattern "%DHCP-6-ADDRESS_ASSIGN: Interface GigabitEthernet1"
 action 1.0 syslog msg "%dCloud-vPodGW: Starting eem restart-csrmgmt"
 action 1.1 cli command "enable"
 action 1.2 cli command "config terminal"
 action 1.3 cli command "virtual-service csr_mgmt"
 action 1.4 cli command "no activate"
 action 1.5 syslog msg "%dCloud-vPodGW: Disabled csr_mgmt and waiting for 10 seconds"
 action 1.6 wait 10
 action 1.7 cli command "activate"
 action 1.8 syslog msg "%dCloud-vPodGW: Enabled csr_mgt and exiting eem restart-csrmgmt"
 action 1.9 cli command "end"

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