Symptom
client device directly connected to ISR4331 with HSRP configured can't ping HSRP VIP,but can ping physical interface IP address.
But on IOS 16.9.8,client device directly connected to ISR4331 with HSRP configured can ping HSRP VIP.
Conditions
1. configure HSRP on a sub-interafce
2. configure service instance under same physical interface.
use ipv4 v1 HSRP virtual mac
use ipv4 v2 HSRP virtual mac
use ipv6 v2 HSRP virtual mac
use vrrp virtual mac
use glbp virtual mac
Workaround
Don't mix service instance configuration and sub-interface configuration in same physical interface
Further Problem Description
this is a new feature, and need a complex solution to fix it.
