HSRP - change source IP address

[Jernej Vodopivec]

Hi!

Is there any way to change source IP address to virtual IP address instead of interface's ip address when routing ip traffic through hsrp enabled interface?

The problem is I have /30 subnet to connect to my ISP and I would like to connect two routers to provide HA for WAN connection.

Is the only solution that ISP to provide /29 subnet instead of /30?

Thanks for any suggestion.

Jernej

[John Blakley · Accepted solution]

Jernej,

The source address will always be sent as the real address on the router and not the vIP. What type of connection is this?

HTH,

John

[Jernej Vodopivec]

This is Ethernet connection with one usable public IP address.

It seems I'll have to ask ISP to provide /29 subnet with 5 usable IP addresses

[paul.matthews · Accepted solution]

With HSRP you will always need N+1 addresses - two routers, three addresses. VRRP allows you to use one less, but even then you would need a /29 to fit both of your addresses plus the ISP router.

Paul.