From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Thu Dec 18 2003 - 16:09:57 GMT-3
Yes, the virtual template interface will always be down. The
virtual access interface is built off the virtual template.
If you need to ping your own IP address, use a dialer interface as
opposed to a virtual template, or use IP unnumbered. Here are the two
examples:
************************
Option 1 - IP unnumbered
************************
interface Loopback0
ip address 150.1.6.6 255.255.255.0
!
interface ATM0/0/0
no ip address
!
!
interface ATM0/0/0.201 point-to-point
pvc 0/201
encapsulation aal5snap
protocol ppp Virtual-Template1
!
!
interface Virtual-Template1
ip unnumbered Loopback0
ppp chap hostname ROUTER6
ppp chap password 0 CISCO
Rack1R6# ping 54.1.7.254 <-- Backbone Router
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 54.1.7.254, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Rack1R6#ping 150.1.6.6
*************************************
Option 2 - Dialer interface for PPPoA
*************************************
interface ATM0/0/0
no ip address
!
interface ATM0/0/0.201 point-to-point
pvc 0/201
encapsulation aal5snap
protocol ppp dialer
dialer pool-member 1
!
!
interface Dialer1
ip address 54.1.7.6 255.255.255.0
encapsulation ppp
dialer pool 1
ppp chap hostname ROUTER6
ppp chap password 0 CISCO
Rack1R6#ping 54.1.7.254
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 54.1.7.254, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Rack1R6#ping 54.1.7.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 54.1.7.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Rack1R6#
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Soup
Shi
Sent: Thursday, December 18, 2003 8:45 AM
To: ccielab@groupstudy.com
Subject: PPP over ATM and virtual template
Hi, group,
I am trying to figure out the concept of virtual template by doing the PPP
over ATM.
What I found weird is first, the interface virtual-template is always down,
although the virtual-access is up and ping is working well. Secondly, I can
not ping its own virtual interface from the router although all other
routers can. It is pretty similar to ISDN interface if the router is not
allowed to dial.
Are both of these results normal? I tried all different encapsulations in
document cd.
Comments are highly appreciated.
Soup
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