We use Ciscos 7513 with IOS 12.05T1 and 128Mb.
Today full routing means about 80K bgp entries and it uses (including IOS,
etc) 80Mb from the 128Mb. I was comparing this with another router that does
not receive BGP. The second one uses less than 15Mb, what means that the BGP
tables are about 65Mb bigger, take it or leave it.
My recommendation? Buy 128Mb for the 3620 and you'll be fine. It might be
slow when receiving the tables for the first time, but after 5-10 minutes
everything will look normal again.
Good luck.
-----Original Message-----
From: Ejay Hire [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, September 19, 2000 10:11 AM
To: [EMAIL PROTECTED]
Subject: Re: Cisco 3640 grunty enough for full-BGP routing?
About two days ago, I was reading an RFC written in 1996 (RFC 1772 or
1773..) and it talked about how the BGP database would fit into 64 mb of ram
in 1995, and all of it would fit except for sprint in 1996, and all of it
would fit except for sprint and ...
You cannot fit the entire BGP table into 20 Mb's of RAM. If you don't have
any input filters set up, then your Isp('s) or someone upstream of them is
filtering. (Filtering a LOT...Like 80%).
You can connect to a looking glass at www.merit.edu, and see the tables.
There is even a section you can ftp to to download the whole database.
----Original Message Follows----
From: "John Kaberna" <[EMAIL PROTECTED]>
Reply-To: "John Kaberna" <[EMAIL PROTECTED]>
To: "Guyler, Rik [EESUS]" <[EMAIL PROTECTED]>, "Jeff Wang"
<[EMAIL PROTECTED]>, "Cisco Groupstudy (E-mail)"
<[EMAIL PROTECTED]>
Subject: Re: Cisco 3640 grunty enough for full-BGP routing?
Date: Mon, 18 Sep 2000 13:15:41 -0700
Cisco 3640 grunty enough for full-BGP routing?The BGP routing table itself
takes up less than 20MB of memory last time I checked (only a couple months
ago). I don't have access to a router running full BGP routes right this
moment but someone should verify this. I am fairly certain it is less than
20. So, you can run it just fine on a 3640 with 128mb. I completely
disagree with this "experienced" CCIE. However, his routers may have
several other services running on them that use a lot of memory. A 3640
with 128mb used simply as an Internet router running BGP will have no
trouble now or in the near future. Does anyone have a 3640 w/BGP that could
provide some current stats?
John
----- Original Message -----
From: Guyler, Rik [EESUS]
To: Jeff Wang ; Cisco Groupstudy (E-mail)
Sent: Monday, September 18, 2000 9:13 AM
Subject: RE: Cisco 3640 grunty enough for full-BGP routing?
A CCIE, experienced in the service provider market, just recently told me
that a 3640 *might* be OK at first, but it would really be a strain to keep
the entire routing table. His reasoning is that 128MB RAM barely covers the
requirements and will allow no room for growth. He went on to say that if
you can, use 256MB, 512MB, etc. as new routes that are added in the future
will drive your memory requirements beyond 128MB.
Rik Guyler
-----Original Message-----
From: Jeff Wang [mailto:[EMAIL PROTECTED]]
Sent: Monday, September 18, 2000 12:18 AM
To: [EMAIL PROTECTED]
Subject: Cisco 3640 grunty enough for full-BGP routing?
Hi all,
Just a quick question regarding 3640 with 128MB DRAM. Will it be
grunty enough to run full-BGP, talking to two different providers and
getting full routes, with one E1 2Mbps WAN link to each provider? What's
your minimum configuration from experience?
TIA,
Jeff Wang
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