From: Scott Morris (swm@emanon.com)
Date: Sun Feb 04 2007 - 02:08:17 ART
The best thing to do here is "debug ip packet" and see what the router tells
you. Most likely what you will be seeing there is an "encapsulation failed"
message, which means that something within your configuration is not
allowing/not returning a Layer2 address for you.
In ethernet world, we have arp that magically does the Layer3 --> Layer2
resolution for us. Depending on your configuration of serial lines (frame
relay???) things may need to be manually set.
In any event, the debug will help you get a handle on what the router is
attempting to do there.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Mohammad Saeed
Sent: Saturday, February 03, 2007 11:56 PM
To: Cisco certification
Subject: Very basic Routing Question!!!!
Hi,
Sorry, my last email I didn't complete and was sent by mistake....
R1's S0/0 is connected to R5's S0/0.1 and they have network address
170.12.23.0/24 with IP Address 170.12.23.1 and 170.12.23.5.
R5 has another S0/0.2 and have IP 173.23.23.5/24. On R1 you give default
route
ip route 0.0.0.0 0.0.0.0 serial 0/0
Now as R5 has
C 173.12.23.0 connected to S0/0
C 173.23.23.0 connected to S0/0
in the Routing table and R 1 has defalut route to R5, if you say
R1# ping 173.23.23.5
Why R5 does not respond, when it has the entry for 173.23.23.5 in the
routing table and R1 is sending the packets with source IP 173.12.23.1????
Because as I understand, R1 will send the packets for any destination to R5,
R5 shall look in to its RT that destination is 173.23.23.0, do I know how to
reach this network, Yes, it is directly connected, so it shall respond, but
its not, can any bosy explain why?
Regards,
Mohammad Zahed
This archive was generated by hypermail 2.1.4 : Thu Mar 01 2007 - 07:38:45 ART