HSRP private IPs on Interface, Official IP as Standby IP

I want to setup two routers in an HSRP group. To not waste 2 IPs within every customer subnet, I would like to have private IPs on the real interfaces and an official IP as the standby IP.

Here's my current HSRP setup of the first router that reflects what I want to do:

--snip---------- interface GigabitEthernet0/3 ip address standby 1 ip 81.xx.xx.1 standby 1 preempt

ip route 81.xx.xx.0 GigabitEthernet0/3


This is not working the way I thought it should be.

# ping -> WORKS # ping 81.xx.xx.1 -> WORKS # ping 81.xx.xx.2 -> FAILS

As soon as I try to ping a host that is connected via Layer 2 to GigabitEthernet0/3, it fails. Though, 81 is pingable when 81.xx.xx.1 is configured as real ip address on the router.

# show arp Protocol Address Age (min) Hardware Addr Type Interface ... Internet 81.xx.xx.1 - 0000.0c07.ac01 ARPA GigabitEthernet0/3 Internet 81.xx.xx.2 2 0050.da20.xxxx ARPA GigabitEthernet0/3 ...

# show standby GigabitEthernet0/3 - Group 1 State is Active 5 state changes, last state change 18:28:04 Virtual IP address is 81.xx.xx.1 Active virtual MAC address is 0000.0c07.ac01 Local virtual MAC address is 0000.0c07.ac01 (default) Hello time 3 sec, hold time 10 sec Next hello sent in 1.372 secs Preemption enabled Active router is local Standby router is unknown Priority 100 (default 100) IP redundancy name is "hsrp-Gi0/3-1" (default)

I found the following post about it, which says it is possible to use private IPs, but it's a hassle to set this up.

formatting link
I don't know what's additionally required, besides setting an ip route for 81.xx.xx.0 to be able to ping 81.xx.xx.2 from the router.

Any hints?

Reply to
Loading thread data ...

Just tested on. So the packets are being sent out with the real interface address. So in my case If there's no route back to it won't work.

Is there any way to make the packets come from the actual standby IP

81.xx.xx.1 instead of the interface IP?
Reply to

Cabling-Design.com Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.