From: Mohamed El Henawy (m.henawy@link.net)
Date: Mon Sep 29 2008 - 04:53:47 ART
Thanks for your help:)
----- Original Message -----
From: Sachin D
To: Mohamed El Henawy
Cc: Vibeesh S ; Cisco certification
Sent: Monday, September 29, 2008 7:36 AM
Subject: Re: Routing Table for RIP ver 1
Here is the link please refer reveive updates section , Which tells if the
host bit is set, then the mask changes to /32
http://www.cisco.com/en/US/tech/tk364/technologies_tech_note09186a0080093fd
8.shtml
On Sun, Sep 28, 2008 at 5:31 PM, Mohamed El Henawy <m.henawy@link.net>
wrote:
Hello Sachin ,
that's why reply to ping was strange for me as its not the broadcast its
the subnet. I thought reply can only happen if i'm pining the broadcast , same
as you ping 255 to get all the arp entries...hmm
for the part of choosing to put /32 is this written somewhere that I can
read ?
regards ,
----- Original Message -----
From: Sachin D
To: Mohamed El Henawy
Cc: Vibeesh S ; Cisco certification
Sent: Sunday, September 28, 2008 1:44 PM
Subject: Re: Routing Table for RIP ver 1
Sorry not broadcast address its subnet number...
On Sun, Sep 28, 2008 at 5:09 PM, Sachin D <networker.ccie@gmail.com>
wrote:
You are receiving the reply because you are pinging the broadcast
address of subnet 192.168.20.48/29 hence you are getting the reply from
loopback0 of R2. Here is the debug ip packet detail on R2
*Sep 28 11:41:05.111: IP: s=192.168.20.33 (FastEthernet0/0),
d=192.168.20.48 (Loopback0), len 100, rcvd 5
*Sep 28 11:41:05.111: ICMP: echo reply sent, src 192.168.20.34, dst
192.168.20.33
Regards
Sachin
On Sun, Sep 28, 2008 at 4:54 PM, Mohamed El Henawy <m.henawy@link.net>
wrote:
Hello ,
i did the same setup and got the /32 as well strange that it doesnt
have entry for it in R2
*Mar 1 00:04:30.247: RIP-DB: redist 192.168.20.48/29(metric 0, last
interface Loopback0) to RIP
*Mar 1 00:04:30.247: RIP-DB: Get redist for network 192.168.20.48
*Mar 1 00:04:30.247: RIP-DB: adding 192.168.20.48/29 (metric 0) via
0.0.0.0 on Loopback0 to RIP database
*Mar 1 00:04:30.251: RIP-DB: add 192.168.20.48/29 (metric 0) via
0.0.0.0 on Loopback0 (donot_age)
*Mar 1 00:04:30.259: RIP-DB: Adding new rndb entry
192.168.20.48/29
On R1
*Mar 1 00:06:34.607: RIP-DB: network_update with 192.168.20.48/24
succeeds
*Mar 1 00:06:34.611: RIP-DB: adding 192.168.20.48/0 (metric 1) via
192.168.20.34 on FastEthernet0/0 to RIP database
*Mar 1 00:06:34.615: RIP-DB: add 192.168.20.48/32 (metric 1) via
192.168.20.34 on FastEthernet0/0
*Mar 1 00:06:34.615: RIP-DB: Adding new rndb entry
192.168.20.48/32
R1#ping 192.168.20.48
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.20.48, timeout is 2
seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/27/80
ms
R1#
R2#
*Mar 1 00:20:07.755: ICMP: echo reply sent, src 192.168.20.34, dst
192.168.20.33
*Mar 1 00:20:07.807: ICMP: echo reply sent, src 192.168.20.34, dst
192.168.20.33
*Mar 1 00:20:07.831: ICMP: echo reply sent, src 192.168.20.34, dst
192.168.20.33
*Mar 1 00:20:07.835: ICMP: echo reply sent, src 192.168.20.34, dst
192.168.20.33
*Mar 1 00:20:07.847: ICMP: echo reply sent, src 192.168.20.34, dst
192.168.20.33
R2#ping 192.168.20.48
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.20.48, timeout is 2
seconds:
.....
Regards ,
----- Original Message ----- From: "Vibeesh S" <vibselva@gmail.com>
To: "Cisco certification" <ccielab@groupstudy.com>; "Vibeesh S"
<vibselva@gmail.com>
Sent: Sunday, September 28, 2008 9:50 AM
Subject: Routing Table for RIP ver 1
Hi All,
I have two router connected back to back. I just started
configuring rip on
them. I got a lil confused by seeing the route table.
I want to know how the subnet masks are being shown when i am
using ver1 of
rip. *[192.168.20.48/32 ]*
I have been practicing a lil while now & my head is aching, am not
able to
reason out. It will be nice if somebody can help me out here.
R1 (f0/0) ---------------------------------- (f0/0) R2
R1Config
--------------
interface Loopback0
ip address 192.168.20.129 255.255.255.224
!
interface Loopback1
ip address 192.168.20.65 255.255.255.224
!
interface FastEthernet0/0
ip address 192.168.20.33 255.255.255.224
duplex auto
speed auto
!
!
router rip
network 192.168.20.0
version 1
R2 Config
--------------
interface Loopback0
ip address 192.168.20.49 255.255.255.248
!
interface Loopback1
ip address 192.168.20.41 255.255.255.248
!
interface FastEthernet0/0
ip address 192.168.20.34 255.255.255.248
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
router rip
version 1
network 192.168.20.0
R1 show ip route
-------------------------
Gateway of last resort is not set
192.168.20.0/24 is variably subnetted, 5 subnets, 2 masks
C 192.168.20.64/27 is directly connected, Loopback1
R 192.168.20.48/32 [120/1] via 192.168.20.34, 00:00:01,
FastEthernet0/0
R 192.168.20.40/32 [120/1] via 192.168.20.34, 00:00:01,
FastEthernet0/0
C 192.168.20.32/27 is directly connected, FastEthernet0/0
C 192.168.20.128/27 is directly connected, Loopback0
R1 Deb ip rip
--------------------
R1#debug ip rip
RIP protocol debugging is on
*Mar 1 00:03:49.935: RIP: sending v1 update to 255.255.255.255
via
FastEthernet0/0 (192.168.20.33)
*Mar 1 00:03:49.935: RIP: build update entries
*Mar 1 00:03:49.935: subnet 192.168.20.64 metric 1
*Mar 1 00:03:49.939: subnet 192.168.20.128 metric 1
*Mar 1 00:03:58.463: RIP: sending v1 update to 255.255.255.255
via
Loopback1 (192.168.20.65)
*Mar 1 00:03:58.463: RIP: build update entries
*Mar 1 00:03:58.463: subnet 192.168.20.32 metric 1
*Mar 1 00:03:58.463: subnet 192.168.20.40 metric 2
*Mar 1 00:03:58.467: subnet 192.168.20.48 metric 2
*Mar 1 00:03:58.467: subnet 192.168.20.128 metric 1
*Mar 1 00:04:00.371: RIP: sending v1 update to 255.255.255.255
via
Loopback0 (192.168.20.129)
*Mar 1 00:04:00.371: RIP: build update entries
*Mar 1 00:04:00.371: subnet 192.168.20.32 metric 1
*Mar 1 00:04:00.375: subnet 192.168.20.40 metric 2
*Mar 1 00:04:00.375: subnet 192.168.20.48 metric 2
*Mar 1 00:04:00.375: subnet 192.168.20.64 metric 1
*Mar 1 00:04:00.775: RIP: received v1 update from 192.168.20.34
on
FastEthernet0/0
*Mar 1 00:04:00.775: 192.168.20.40 in 1 hops
*Mar 1 00:04:00.779: 192.168.20.48 in 1 hops
R1#
R1#u all
Thanks,
Vibeesh
Blogs and organic groups at http://www.ccie.net
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____
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