From: Degu, Chris (deguc@xxxxxxxxxxxxxxxxxx)
Date: Mon Jan 08 2001 - 17:54:11 GMT-3
I think David did a good job in clarifying the issue...Can you give us a
better explanation Sheref if you think David is "Falling" us?
Chris
-----Original Message-----
From: SherefMohamed@cdh.org [mailto:SherefMohamed@cdh.org]
Sent: Monday, January 08, 2001 3:32 PM
To: frank wells
Cc: ccielab@groupstudy.com; nobody@groupstudy.com
Subject: Re: routing table question
This is not truth & please stop falling peoples if you are not sure of the
answer !!!
"frank wells"
<fwells12@hot To: ccielab@groupstudy.com
mail.com> cc:
Sent by: Subject: Re: routing table
question
nobody@groups
tudy.com
01/08/2001
02:14 PM
Please
respond to
"frank wells"
The router puts all directly connected routes in first because it finds
those quickest. It will then add the static routes followed by routes
learned via a routing protocol. Routes are given an administrative
distance
(weight) depending on the routing protocol they were learned from.
Administrative Distance is used to choose the most trustworthy routing
protocols' route over other less trustworthy routing protocols. See Later.
What it advertises is a whole different discussion...
When performing a route lookup, it uses the following ordered criterion to
determine the best route to the destination network:
1 Host address
2 A subnet
3 A group of subnets (summary route etc)
4 A major network address
5 A group of major network addresses (supernet)
6 Default route or network etc
For administrative distance, the route with the lowest weight will
ordinarily be the one added to the route table:
Table:
Connected Interface 0
Static Route 1
Eigrp Summary Route 5
External BGP 20
Eigrp 90
IGRP 100
OSPF 110
IS-IS 115
RIP 120
EGP 140
External Eigrp 170
Internal BGP 200
Unknown 255
Pick up a copy of Routing TCP/IP by Jeff Doyle. It rules.
>From: David M Anderson <dma@cisco.com>
>Reply-To: David M Anderson <dma@cisco.com>
>To: ccielab@groupstudy.com
>Subject: routing table question
>Date: Mon, 08 Jan 2001 11:34:22 -0800
>
>I thought I would include a subject line this time...
> >Date: Mon, 08 Jan 2001 11:32:27 -0800
> >To: ccielab@groupstudy.com
> >From: David M Anderson <dma@cisco.com>
> >
> >I have a real simple question that I just don't seem to see the answer
>to. In which order are routes added to a routing table? I have tried to
>see if it is metrics, routing protocol, order learned.....etc. It seems
to
>be the order learned, but I am not sure about that. Can anyone clarify?
> >
> >Thanks,
> >David
>
>David Anderson
>Lab Engineer
>(408) 853-5515
>dma@cisco.com
>
> | |
> :|: :|:
> :|||: :|||:
> .:|||||||:..:|||||||:.
>C I S C O S Y S T E M S
>
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