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DHCP-Discover with HSRP

andreas-bauer
Level 1
Level 1

Hello,

 

I have a general question about DHCP and HSRP.

I have configured two redundant CISCO routers with the IP 10.0.0.2 (active) and 10.0.0.3 (standby).

Their virtual HSRP address is 10.0.0.1 .

When my clients send DHCP pakets to the DHCP-Server over the routers, they send a DHCP-discover to 10.0.0.2 and a discover to 10.0.0.3 but not to 10.0.0.1.

Is this the right way or shouldn´t the pakets go to the HSRP address?

 

Thanks for your help.

1 Accepted Solution

Accepted Solutions

Aaron Harrison
VIP Alumni
VIP Alumni

Hi

DHCP Discovers are usually broadcast, not targeted to a specific IP?

If the clients are trying to renew and don't get a response from something they are unicasting to, they'll do a DHCP Discover via broadcast and get picked up by anything on the local subnet that is interested in serving them... so it shouldn't matter.

Aaron

Aaron Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!

View solution in original post

1 Reply 1

Aaron Harrison
VIP Alumni
VIP Alumni

Hi

DHCP Discovers are usually broadcast, not targeted to a specific IP?

If the clients are trying to renew and don't get a response from something they are unicasting to, they'll do a DHCP Discover via broadcast and get picked up by anything on the local subnet that is interested in serving them... so it shouldn't matter.

Aaron

Aaron Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
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