HSRP question!

skhirbash · ‎07-09-2008

I have a router that has the following configuration on one of the Eth interfaces:

interface FastEthernet2/0

ip address 10.10.24.15 255.255.252.0

ip helper-address 10.95.163.225

ip helper-address 10.95.195.226

ip directed-broadcast

ip pim sparse-dense-mode

ip cgmp

speed 100

full-duplex

standby 24 ip 10.10.24.1

standby 24 priority 90

bridge-group

However, the 10.10.24.1 isn't assigned on any of the other interfaces but I am able to ping it and telnet to it which connects me to the router. I am puzzled as where the 10.10.24.1 ip is, hich is assigned for the HSRP interface !

Thanks in advance for your help!

sK

ralphcarter · ‎07-09-2008

HSRP is enabled for this fast 2/0 interface. HSRP uses a mac-address in the form of 00-00-0c-07-ac-xx where xx is group 24 in hex. When this router interface uses hsrp and has a higher priority then its peers, then the hsrp ip is bound to this interface using a custom mac address.

Do a "show standby" and it will explain more about your config.

CCIE 26175
www.techsnips.com

skhirbash · ‎07-09-2008

Great!

Thanks Raplph,

sK

wilson_1234_2 · ‎07-09-2008

It is located on your router as a virtual interface.

Typically there would be a second router with a lower or higher priority that would be part of the router "pool".

Higher priority wins and all of the routers together would be seen as 10.10.24.1 by anything using them as a gateway.

If the highest priority router fails, the second highest priority takes over as 10.10.24.1 and none of the devices using the interface as a gateway, knows anything about the failure of the first router.

skhirbash · ‎07-09-2008

Thanks Wilson. Your explaination helped me a lot!

sK

sdoremus33 · ‎07-09-2008

standby 24 ip 10.10.24.1

assigns 10.10.24.1 address