From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sun Mar 05 2006 - 02:39:36 GMT-3
KC,
When PPPoFR is used with the virtual-template, it's not IP
over Frame Relay but now IP over PPP over Frame Relay. The "frame-relay
map ip" command doesn't do anything for the original poster's
configuration since IP isn't running directly over Frame Relay.
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
________________________________
From: KC [mailto:kanwal.chawla@gmail.com]
Sent: Saturday, March 04, 2006 8:35 PM
To: Brian Dennis
Cc: Joe Gagznos; Group Study (E-mail)
Subject: Re: Frame Relay & Virtual Templates
Hi All
Well i believe, u should never use Dynamic mapping, its better to use
Manual mapping of DLCI. If you cant ping ur own IP , there is one
solution :-
1. whenever u configure Manual mapping, u always give, (frame-relay map
ip <next hop ip> <local DLCI> broadcast)
2. if u wanna ping ur self, then run this command also ( frame-relay map
ip <local ip> <local DLCI> broadcast)
You would be able to ping urself.
Regards
KC
On 3/4/06, Brian Dennis <bdennis@internetworkexpert.com> wrote:
Joe,
By default you can not ping your own virtual-template
interface's IP address. Do not worry about this behavior in the real
lab unless the lab specifically asks you to be able to ping your own
interfaces. You will not fail a full reachability test because of
something like this.
Note that when pinging yourself over a WAN link (HDLC, Frame
Relay, etc) the ICMP echo is sent out the interface that the IP address
is applied. The router on the remote end then routes the ICMP echo back
to the router that originated the ping. Then the originating route
replies to the ICMP echo and sends an ICMP echo-reply out the interface.
The remote router then turns around and sends the ICMP echo-reply right
back. This is the reason pinging your own interface takes roughly twice
as long over pinging the remote end's interface. Also pinging yourself
doesn't have many uses in the real world.
As you can see below ping yourself takes roughly twice as long
as pinging the remote end.
Rack1R4#sho ip int brief
Interface IP-Address OK? Method Status
Protocol
Serial0/1 145.1.45.4 YES manual up up
Rack1R4#ping 145.1.45.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 145.1.45.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/57/60 ms
Rack1R4#ping 145.1.45.5
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 145.1.45.5, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/30/32 ms
Rack1R4#
HTH,
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Joe Gagznos
Sent: Saturday, March 04, 2006 5:19 PM
To: 'Group Study (E-mail)'
Subject: Frame Relay & Virtual Templates
I am working on a lab where I am asked to configure ppp over frame relay
- a
seemingly simple task.
The issue I have is that I am unable to ping the local IP configured
under
the virtual template of each router. I have configured no
authentication
because I need to see proper ip connectivity before I add extra layers
of
complexity to the requirement later on.
My concern is that if I can't ping the local IP, then I will have an
issue
when it comes time to grade for "full IP reachability".
Here are the pertinent configurations for each router named R1 & R2.
R1
interface Serial0/0
no ip address
encapsulation frame-relay
frame-relay interface-dlci 102 ppp Virtual-Template1
no frame-relay inverse-arp
interface Virtual-Template1
ip address 163.1.12.1 255.255.255.0
R2
interface Serial0
no ip address
encapsulation frame-relay
frame-relay interface-dlci 201 ppp Virtual-Template1
no frame-relay inverse-arp
interface Virtual-Template1
ip address 163.1.12.2 255.255.255.0
----------------------------------------------------------------------
R1#ping 163.1.12.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 163.1.12.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/7/8 ms
-----------------------------------------------------------------------
R1#ping 163.1.12.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 163.1.12.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
------------------------------------------------------------------------
R2#ping 163.1.12.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 163.1.12.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/8/8 ms
------------------------------------------------------------------------
-
R2#ping 163.1.12.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 163.1.12.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
What am I doing wrong?
Thanks,
Joe Gagznos
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