Question is: How often do you use "soft reconfiguration" ?
If you take it out, it will reduce your memory requirements with about
50%. Soft reconfiguration will keep a copy of every BGP routing table it
receives, eBGP and iBGP.
If you have a stable environment (no frequent changes in advertized
prefixes) and are low on memory, take it out.
Ton S.
Kurt Richter wrote:
Hmm . . . I question if that is correct (the 1GB DRAM part of your statement). I have two 2811s each receiving full routes from a different Tier-1 ISP across a T-1, and of course an iBGP session between them.
I was originally running only one router with full Internet routes from only one carrier with 256M, no problem. When I added the second router and second BGP peer also with full routes, the routers couldn't maintain the sessions -- kept resetting due to memory insufficiency. So I upgraded both routers to 512M and no problems. I suspect I could probably run in this configuration with 320M or 384M, but I just figured why screw around and upgraded to 512M.
With that said, I doubt the 2851 has much if any more overhead at idle than the 2811, and could probably get by on 384M-512M. Below is output from one of my 2811s
Note: I am running NTP server, DHCP (very little overhead), OSPF (very little mem overhead), HSRP, ACLs on these routers. No CBAC or QoS.
FWIW
kr
_________________________________________
Kurt Richter
CCIE #8122, MCNX #1151
Sales Engineer
240 East Morris Avenue, Suite 325
Salt Lake City, UT 84115
801 326 1005
801 326 1020 fax
801 971 2270 wireless
kurt.richter"AT"ltstream.com
To unsubscribe via postal mail, please contact us at:
Jupitermedia Corp.
Attn: Discussion List Management
475 Park Avenue South
New York, NY 10016
Please include the email address which you have been contacted with.
Copyright 2007 Jupitermedia Corporation All Rights Reserved.
