DHCP default-router

From: CCIE KH49279 (ccie_lab@inetiq.com)
Date: Tue Apr 25 2006 - 20:06:13 GMT-3


Group,

I am a bit confused about the use of the default-router command in DHCP.

I understand the function of the command and the information it will cause
the dhcp server to provide to the host.

However, the documentation mentions that up to 8 default-routers can be
assigned under this command. To me this suggest that you can provide some
level (albeit not very flexible) of gateway redundancy. I unfortunately have
no facility to test this critter so I am posting to the group for your
assistance and knowledge.

What happens if I use this as part of my configuration:

Default-router 192.168.10.1 192.168.10.2 192.168.10.3

If for instance the host initially gets 10.1 assigned as the
default-gateway, and then during the lease period 10.1 becomes unreachable,
will the host automatically switch to the 10.2 gateway, or will the host
query the dhcp server again and then be assigned the 10.2 address, or ???

Thanks in Advance,

Wayne



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