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Enthusiast

HSRP - change source IP address

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

2 ACCEPTED SOLUTIONS

Accepted Solutions
Advisor

HSRP - change source IP address

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

HTH, John *** Please rate all useful posts ***
Contributor

HSRP - change source IP address

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.

3 REPLIES 3
Advisor

HSRP - change source IP address

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

HTH, John *** Please rate all useful posts ***
Highlighted
Enthusiast

HSRP - change source IP address

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

Contributor

HSRP - change source IP address

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.

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