RE: (PM) BGP4 & IRX114 (and a couple of questions) (fwd)

MegaZone (megazone@livingston.com)
Sat, 17 Jan 1998 09:51:43 -0800 (PST)

Once upon a time Mark Johnson shaped the electrons to say...
>This is inserting an extra AS path in the info sent to a specific upstream
>where I only have a small connection. Other ISP's behind my upstream would

I think we can do this, it rings a bell. Unfortunately I'm on vacation
until the 26th so I won't be in the office to look this stuff up. Maybe
support can help.

(Actually if I get some time I'll try the web manuals too.)

>If I do run BGP4 with several peers, and I take at least two full routes
>16Mb would cut it pretty close on a PM3 with 16Mb. My IRX114 has two BGP
>sessions taking full routes (48k) and only a static route. This leaves
>approx. 3Mb free memory. The PM3 has a larger overhead (according to your

Hmm, we had 4 full feeds into an IRX when we did testing and it just fit
in 16MB. But I suppose it will vary some.

>Memory is so cheap why bother cutting it close and taking a gamble?

True. 32MB would be safer.

>As I already said, would an IRX with 16Mb handle all of this? My worry is

I think I misread the first time - I was reading the 2 E1s as 2 BGP feeds.
But I think you mean 6 BGP peers using and the 2 lines. No, an IRX wouldn't
handle that - It would run out of RAM with 6 full feeds.

But a PM-3 will handle that with 32MB.

>PM3 with 32Mb would be OK but the basic BGP options could cause problems.

What kind of problems do you mean?

-MZ

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