From: Fowlie, Colin (Colin.Fowlie@aliant.ca)
Date: Mon Feb 09 2004 - 11:24:47 GMT-3
Hi all,
I am helping create some practice scenarios for internal employees, and this following issue was brought to my attention: A router allows duplicate IP addresses to be assigned to Frame-Relay subinterfaces. For example:
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.130.6.35 YES NVRAM up up
Serial0/0 unassigned YES NVRAM up up
Serial0/0.50 10.130.5.41 YES manual up up
Serial0/0.408 10.130.5.37 YES manual up up
Serial0/0.500 10.130.5.37 YES manual up up
interface Serial0/0.408 point-to-point
ip address 10.130.5.37 255.255.255.252
ip nat inside
no cdp enable
frame-relay interface-dlci 408
end
interface Serial0/0.500 point-to-point
ip address 10.130.5.37 255.255.255.252
ip nat inside
no cdp enable
frame-relay interface-dlci 500
end
Trying to apply IP address assigned to any other type of interface on the box does not work, only the IP address of other Frame subinterfaces. I haven't been able to track down a bug on this issue, wondering if anyone has seen this before and if it is default behavior. Show ip route 10.130.5.37 shows equal-cost connected routes for each configured interface.
Thanks in advance
Colin Fowlie
#12757
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