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Thread: BGP on Juniper EX4300 question
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09-23-2013, 01:27 AM #1Junior Guru Wannabe
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BGP on Juniper EX4300 question
Would a Juniper EX4300 switch support the application of BGP in today's internet?
I am looking for a switch/router to use in a datacenter and support 1Gbps network throughput.█ SupremeBytes, LLC
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09-23-2013, 01:33 AM #2Web Hosting Master
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I don't think 2GB of memory is enough for today's BGP. Not to mention all of your VLANs and memory required to manage the stack.
While it may technically be possible to announce BGP with it, it would definitely not be ideal and lead to sub-par performance.Steven Crothers
No BS cloud engineer and Red Hat architect.
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09-23-2013, 01:35 AM #3Junior Guru Wannabe
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09-23-2013, 01:37 AM #4Web Hosting Master
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09-23-2013, 01:38 AM #5Colocation Guru
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What will be the use of the switch? What sort of routes are you taking?
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09-23-2013, 01:40 AM #6Junior Guru Wannabe
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It would have about 2-4 BGP peers. We would need about 10 to 15 vLAN's. This of course, will probably change in the future.
Last edited by DamienSB; 09-23-2013 at 01:48 AM.
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09-23-2013, 01:53 AM #7Web Hosting Master
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What are you going to receive from the peers?
If they are Internet transit providers and you wish to receive full tables.. Then no, the EX4300 will not do this.
The EX4300 supports 32,000 routes (It will probably hold more, but it's not going to hold nearly half a million for the Internet).█ REDUNDANT.COM • Equinix Data Centers • Performance Optimized Network
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09-23-2013, 10:12 AM #8Web Hosting Guru
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Get a brocade CER -RT version
Great pricing, offers identical swich port configs and does full table bgp
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09-23-2013, 11:32 AM #9Temporarily Suspended
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If you use BGP only for default routes and internal BGP it will work. 2 GB will be more than enough for this (only 32k routes are possible with EX4300).
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09-23-2013, 01:21 PM #10Web Hosting Master
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09-23-2013, 08:45 PM #11
Doing some searching on here for routers recently, I came accross a number of posts indicating that the CER falls over under moderate traffic. Not sure if the RT version changes this or not but it at least justifies further investigation before considering that platform.
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09-23-2013, 10:12 PM #12Web Hosting Guru
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09-23-2013, 10:16 PM #13
Assuming the info I saw was correct, it would seem that it's more of a throughput issue than anything, i.e. pushing a couple gig the thing falls over, rather than a more typical issue you see other places like a limit on number of routes or arp or cpu or memory or whatever. Really seems like a serious issue that a supposedly high end (and high priced) router with 4x10g port options that can't do more than a couple gigs before dying. The MX80 would seem a better option as it's a similar price, can be configured with similar port count, and is known for better performance and a similar routing table size (1mm mx80 vs 1.5mm CER).
I haven't used either router myself, so I do think additional research is justified before recommending one over the other, but certainly I wouldn't jump head first into the CER without figuring out why these other people had these issues and see if you are likely to have the same ones or not.IOFLOOD.com -- We Love Servers
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09-24-2013, 02:42 PM #14Junior Guru
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09-25-2013, 09:06 AM #15Temporarily Suspended
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I don't have tried it yet. But I recommend to apply policy filters to avoid this problem.
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09-25-2013, 09:55 AM #16Randy
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32k routes is nothing. You might be able to take a default+partials. MAYBE. For a dual carrier 'failover' setup this router might work well for you but if you want any kind of decent routing or load balancing while maintaining redundancy, well, good luck with it.
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09-25-2013, 10:29 AM #17Web Hosting Master
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09-25-2013, 10:32 AM #18Web Hosting Master
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You wouldn't run this configuration with routes at scale. It would really be for something like having two or more bgp sessions that all sent default routes to you.
Say you wanted to have a premium carrier like Level(3), and protect that with Cogent and you didn't care about using cogent for much of anything.
Sure you could install some routes to go around the primary carrier. For example lets pretend Cogent has excellent connectivity to Comcast, and is 1/6 the cost of Level(3),you could pick up a bunch of Comcast's largest prefixes and be just fine with that kind of traffic engineering.█ REDUNDANT.COM • Equinix Data Centers • Performance Optimized Network
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09-25-2013, 02:47 PM #19Randy
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09-25-2013, 02:55 PM #20Web Hosting Master
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The routes would be tied to the interface status, so if the interface went down the routes would uninstall.
You could also configure the switch to monitor external target IP's across your uplinks and have it shut down the Interface / BGP / uninstall routes / etc based on real world performance metrics rather than just BGP session availability.█ REDUNDANT.COM • Equinix Data Centers • Performance Optimized Network
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09-25-2013, 05:58 PM #21Web Hosting Master
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09-25-2013, 06:03 PM #22Web Hosting Master
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09-25-2013, 06:41 PM #23Web Hosting Master
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Don't know until you ask. Providers usually can do that.
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