Below is the outputs of both HSRP status and LAN ip address where subnet mask is different for both the LAN interface of Main and Backup.
Device Type ISR4431/K9
IOS :isr4400-universalk9.16.09.05.SPA.bin
Main router not able to get response for the multicast ip for the HSRP
MAIN#ping 224.0.0.89
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.0.0.89, timeout is 2 seconds:
.
MAIN#ping 10.18.0.18 so GigabitEthernet0/0/1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.18.0.18, timeout is 2 seconds:
Packet sent with a source address of 10.18.0.17
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
MAIN#sh stand
GigabitEthernet0/0/1 - Group 1
State is Standby
10 state changes, last state change 02:36:54
Virtual IP address is 10.18.0.19
Active virtual MAC address is 0000.0c07.ac01 (MAC Not In Use)
Local virtual MAC address is 0000.0c07.ac01 (v1 default)
Hello time 3 sec, hold time 10 sec
Next hello sent in 0.560 secs
Preemption enabled
Active router is 10.18.0.18, priority 130 (expires in 9.264 sec)
Standby router is local
Priority 110 (configured 110)
Group name is "hsrp-Gi0/0/1-1" (default)
MAIN#sh run int Gi0/0/1
Building configuration...
Current configuration : 261 bytes
!
interface GigabitEthernet0/0/1
description WesternRegion-Municipality-LAN
ip address 10.18.0.17 255.255.255.240 <<< LAN subnet mask is different on backup
no ip redirects
no ip unreachables
no ip proxy-arp
standby 1 ip 10.18.0.19
=====
From Backup able to get response for HSRP multicast and LAN of Main router
STDBY#ping 10.18.0.17 so 10.18.0.18
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.18.0.17, timeout is 2 seconds:
Packet sent with a source address of 10.18.0.18
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
mss-adnet-westmunicipality-rb#ping 224.0.0.89
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.0.0.89, timeout is 2 seconds:
Reply to request 0 from 10.18.0.9, 4 ms
Reply to request 0 from 10.18.0.17, 4 ms
mss-adnet-westmunicipality-rb#sh stand
GigabitEthernet0/1 - Group 1
State is Active
8 state changes, last state change 02:38:56
Virtual IP address is 10.18.0.19
Active virtual MAC address is 0000.0c07.ac01
Local virtual MAC address is 0000.0c07.ac01 (v1 default)
Hello time 3 sec, hold time 10 sec
Next hello sent in 1.168 secs
Preemption enabled
Active router is local
Standby router is 10.18.0.17, priority 110 (expires in 8.400 sec)
Priority 130 (configured 130)
Group name is "hsrp-Gi0/1-1" (default)
mss-adnet-westmunicipality-rb#sh run int GigabitEthernet0/1
Building configuration...
Current configuration : 284 bytes
!
interface GigabitEthernet0/1
description ADNET-ADNET-West Region Municipality Backup-LAN
ip address 10.18.0.18 255.255.255.248 <<< LAN subnet mask is different on main
no ip redirects
no ip unreachables
no ip proxy-arp
standby 1 ip 10.18.0.19
