From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sat Mar 05 2005 - 17:47:48 GMT-3
<Quote>
If summary route is announced to BB router, there is no way to find if
it
work or not.
</Quote>
It would actually be really easy to test. Just create a loopback
interface (or use an existing interface) that has an IP address in part
of the summarized range and then ping the BB router sourcing the ping
off of the loopback (or existing interface). If you get a reply to the
ping, you will know that the BB is receiving the summarized route.
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
Jongsoo.Kim@Intelsat.com
Sent: Saturday, March 05, 2005 10:49 AM
To: ccielab@groupstudy.com
Subject: Summary address for rip
I am sure many of you know about this.
This is totally news to me. ( I have obvioulsy underestimated the
mighty
RIP!)
As passive interface behaves differently between Rip and EIGRP, so does
ip
summary-address.
For rip, Ip split-horizon has be to diable for summary-address to be
advertise, while EIGRP don't care about it.
If summary route is announced to BB router, there is no way to find if
it
work or not.
For rip, Ip split-horizon has be to diable for summary-address to be
advertise, while EIGRP don't care about it unless you out things right!
This is the very reason I believe Rip is the most tricky in IGP!!!
See below I copy from IOS command.
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_command_
refe
rence_chapter09186a008010a39d.html#wp1019063
<http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_command
_ref
erence_chapter09186a008010a39d.html#wp1019063>
In the following example the major network is 10.0.0.0. The summary
address
10.2.0.0 overrides the autosummary address of 10.0.0.0, so that 10.2.0.0
is
advertised out Ethernet interface 1 and 10.0.0.0 is not advertised.
Note <<...OLE_Obj...>> If split horizon is enabled, neither autosummary
nor
interface summary addresses (those configured with the ip
summary-address
rip command) are advertised.
router rip
router interface e1
ip address 10.1.1.1 255.255.255.0
ip summary-address rip 10.2.0.0 255.255.0.0
no ip split-horizon
router rip
network 10.0.0.0
Question : Is there any other way to summarize address in rip ?
Regards
Jongsoo
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