RE: How to calculate routing table

From: Mark Stephanus Chandra (mark.chandra@gmail.com)
Date: Mon Sep 29 2008 - 07:43:04 ART

Reza And Shawn,

Thank you very much, This is really useful info

Regards

Mark Stephanus Chandra
IT Consultant
-----Original Message-----
From: Reza Toghraee [mailto:reza@toghraee.com]
Sent: 29 September 2008 17:09
To: 'Shawn Zandi'
Cc: mark.chandra@gmail.com; ccielab@groupstudy.com
Subject: RE: How to calculate routing table

Great, nice command.
Also I think we can monitor and plan to change the SDM of a L3 switch using
this command.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Shawn Zandi
Sent: Monday, September 29, 2008 12:45 PM
To: Reza Toghraee
Cc: mark.chandra@gmail.com; ccielab@groupstudy.com
Subject: Re: How to calculate routing table

#show ip route summ

IP routing table name is Default-IP-Routing-Table(0)
Route Source Networks Subnets Overhead Memory (bytes)
connected 0 2 128 320
static 1 44 2880 7200
bgp 6447 136272 143642 17914496 45134060
  External: 279914 Internal: 0 Local: 0 

-- 
Sincerely,
Shawn Zandi
Routing, Switching & Security Consultant
CCIE (Routing & Switching) - MCSE
web: http://www.shafagh.com
email: shafagh@shafagh.com

On Mon, Sep 29, 2008 at 9:50 AM, Reza Toghraee <reza@toghraee.com> wrote:

> Mark,
>
> I think its better to check a live internet router memory usage, then you
> can find the appropriate required memory.
> Try to telnet in route-views.routeviews.org, then enter commands to check
> the memory usage, bgp table.
> This is a 7206VXR in route viewer. 1 GB memory, 41 MB free.
>
> route-views.oregon-ix.net>show ip bgp sum
> 280049 network entries using 28284949 bytes of memory
> 8964779 path entries using 430309392 bytes of memory
> 1508909 BGP path attribute entries using 84506520 bytes of memory
> 1277712 BGP AS-PATH entries using 34160322 bytes of memory
> 23071 BGP community entries using 1678724 bytes of memory
> 13 BGP extended community entries using 412 bytes of memory
> 0 BGP route-map cache entries using 0 bytes of memory
> 0 BGP filter-list cache entries using 0 bytes of memory
> BGP using 578940319 total bytes of memory
>
> Reza
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> mark.chandra@gmail.com
> Sent: Monday, September 29, 2008 7:35 AM
> To: ccielab@groupstudy.com
> Subject: How to calculate routing table
>
> dear friends,
>
> I just wonder how to calculate routing table on a router.How much memory
> consume for 1 routing table?
> I planned to have full internet routing table with 3845 with 512 DRAM, is
> it
> scalable or not?
>
> Thx a lot
>
> Mark Stephanus
> Sent from my BlackBerry. wireless device from XL GPRS/EDGE/3G network

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