[c-nsp] IP unnumbered vlan subinterfaces question

[Brian Turnbow]

Not sure what's attached to the IP, or what you want to achieve , but a different approach would be to add no keepalive to the ethernet so it is always up.
  


Brian 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Michael Ulitskiy
Sent: lunedì 3 agosto 2009 17.10
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] IP unnumbered vlan subinterfaces question

Hello,

Guys, are there any drawbacks of doing the following:

interface Lo0
 ip address 10.10.10.1 255.255.255.0
!
interface FastEthernet0/0.1
 encapsulation dot1q 1 native
 ip unnumbered Lo0
!
ip route 10.10.10.0 255.255.255.0 FastEthernet0/0.1
!

as opposed to having ip address configured directly on the interface as usual?
I need that ip address to stay always up regardless of Fa0/0 state, 'cause it's used for other services that should stay up
and I'd prefer to avoid assigning another ip address exclusively for loopback use.
It seems to work in my lab, but I thought I'd better ask...

Thanks,
Michael
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