Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Multiple IP Unnumbered Loopback interfaces on Cisco 7206VXR (NPE-G1)

I currently have two 7206VXR routers serving DHCP addresses to several thousand subs. We are in the process of re-IPing the network and want to minimize impact as much as possible.

Can I have two ip unnumbered loopback interfaces active at the same time on one ATM sub-interface? If so we can keep service up for subscribers on the old scope until their lease expires - then they will renew off of the new scope.

Current config below (with fictional IP's)

rbe nasip Loopback10

interface Loopback10

ip address 1.2.3.4 255.255.248.0

interface ATM1/0.200 point-to-point

description IMAS DHCP

ip unnumbered Loopback10

ip helper-address 5.6.7.8

atm route-bridged ip

range pvc 10/33 10/5000

encapsulation aal5snap

1 REPLY
Silver

Re: Multiple IP Unnumbered Loopback interfaces on Cisco 7206VXR

I don't think two ip unnumbered statements can be added to the same ATM subinterface. The interface can have secondary IP addresses instead. For details on the ip unnumbered configuration refer

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094e8d.shtml

318
Views
0
Helpful
1
Replies