From: Kemal Yildirim \(Netron\) (Kemal.Yildirim@netron.com.tr)
Date: Tue Apr 25 2006 - 04:05:43 GMT-3
Hi Victor,
EBGP speakers mostly advertise routes with their IP address as next hop.
But if you have a multiaccess network as ethernet and all the BGP
speakers connected to the same segment, EBGP speakers can advertise the
original next-hop IP address.
Assume that R1, SW2 and SW1 all connected to the same IP segment.
So, Sw2 will advertise R1 as next-hop in advertisements to SW1.
Check out TCP/IP VolII p102
Regards,
Kemal
Objects are what is unalterable and subsistent; their configuration is
what is changing and unstable. So you need PRACTICE,PRACTICE, AND MORE
PRACTICE...
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Victor Cappuccio
Sent: Tuesday, April 25, 2006 6:24 AM
To: CCIE LAB
Subject: Next-Hop Attribute...
Hello Guys
I had configured this situation
http://www.ripe.net/ripe/meetings/ripe-40/tutorials/bgp-tutorial/sld020.
html
just to understand a little bit more the next-hop attribute in 3 routers
As 200 R1 --- ebgp --- As 400 Sw2 ---- ebgp ---- As 300 Sw1
So I get this
Rack1Sw1#show ip bgp
Network Next Hop Metric LocPrf Weight Path
*> 10.1.1.0/24 164.1.18.1 0 400 200 i
*> 10.8.8.0/24 164.1.18.8 0 0 400 i
Reading 1772 Says
A BGP speaker can advertise any external border router as the next hop,
provided that the IP address of this border router was learned from one
of the BGP speaker's peers, and the interface associated with the IP
address of this border router (as specified in the NEXT_HOP path
attribute) shares a common subnet with the local and remote BGP
speakers. A BGP speaker needs to be able to support disabling
advertisement of external border routers.
But I Just do get the wording used in the above sentence.
Could anyone please be so king in translating this in very basic level
Thanks Victor.
This archive was generated by hypermail 2.1.4 : Mon May 01 2006 - 11:41:59 GMT-3