From: Donny MATEO (donny.mateo@sg.ca-indosuez.com)
Date: Mon Dec 30 2002 - 23:03:57 GMT-3
you need a new BGP protocol!
If you're worried about the so called no null0 route requirement in the exam, I suppose if they said
explicitly that you need to aggregate certain route they would have given you a clue if they don't
want you to use aggregate address (static and redistribute or network command ). Personally i take
it as if they want me to do something specific it will overwrite the other general rule.
It's like when they say, put a static route on this router and advertised it through bgp. If you
follow the general rule there should not be any static route bla bla bla unless specified otherwise.
If you're not sure and you have time, check it out with the proctor.
good luck.
"Joe Chang"
<changjoe@earthli To: <ccielab@groupstudy.com>
nk.net> cc:
Sent by: Subject: Re: How to get rid of Null0 route that is created by BGP aggregation
nobody@groupstudy
.com
31-12-2002 02:07
Please respond to
"Joe Chang"
Looks like you want to advertise the aggregate address, but do not want to
keep it in the routing table. I don't think that's an option because the
route to Null0 is automatically installed as a routing loop prevention
feature. Say you had also had a default route pointing out to one of the AS
400 neighbors. If your router received a packet from AS 400 for
"192.168.0.1" it would send it back to AS 400, which would send it back to
you, etc etc.
----- Original Message -----
From: "Aamer Kaleem" <kaleemaamer@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, December 29, 2002 5:17 AM
Subject: How to get rid of Null0 route that is created by BGP aggregation
> Here is BGP Config:
>
> router bgp 100
> no synchronization
> network 100.100.100.0 mask 255.255.255.0
> network 161.61.160.0 mask 255.255.255.0
> network 161.61.161.0 mask 255.255.255.0
> network 192.168.1.0
> network 192.168.2.0
> network 192.168.3.0
> network 200.100.100.0
> network 200.200.100.0
> network 200.200.200.0
> aggregate-address 192.168.0.0 255.255.252.0
> neighbor 161.61.16.3 remote-as 400
> neighbor 161.61.16.3 send-community
> neighbor 161.61.16.3 route-map set-as out
> neighbor 161.61.16.6 remote-as 400
> neighbor 161.61.16.6 send-community
> neighbor 161.61.16.6 route-map set-as out
> no auto-summary
>
> BGP also adds a 192.168.0.0/22 route to null0
> interface in the routing table....can it be avoided?
>
> Thank you,
>
> Aamer
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
> http://mailplus.yahoo.com
> .
.
This message is for information purposes only and its content
should not be construed as an offer, or solicitation of an offer,
to buy or sell any banking or financial instruments or services
and no representation or warranty is given in respect of its
accuracy, completeness or fairness. The material is subject
to change without notice. You should take your own independent
tax, legal and other professional advice in respect of the content
of this message. This message may contain confidential or
legally privileged material and may not be copied, redistributed
or published (in whole or in part) without our prior written consent.
This email may have been intercepted, partially destroyed,
arrive late, incomplete or contain viruses and no liability is
accepted by any member of the Credit Agricole Indosuez group
as a result. If you are not the intended recipient of this message,
please immediately notify the sender and delete this message
from your computer.
.
This archive was generated by hypermail 2.1.4 : Fri Jan 17 2003 - 17:21:55 GMT-3