Hello, I currently have 2 routers with a single gigabit link (and corresponding internal BGP session) between them. router1 <---------gigabit------->router2 Simple setup. Now that we have reached the limit on this gigabit link, we are adding a second gigabit link between the same 2 routers, and we wish to load balance across them. Traffic is about 5:1 ratio of out:in. router2 has bgp sessions with several upstreams, and router 1 has bgp sessions with further internal routers. What is the best way to balance across these 2 links? --- dan
Upgrade to 10 gigabit :) -Mike On 5/7/07, dan <deearekay@gmail.com> wrote:
Hello, I currently have 2 routers with a single gigabit link (and corresponding internal BGP session) between them. router1 <---------gigabit------->router2
Simple setup. Now that we have reached the limit on this gigabit link, we are adding a second gigabit link between the same 2 routers, and we wish to load balance across them. Traffic is about 5:1 ratio of out:in. router2 has bgp sessions with several upstreams, and router 1 has bgp sessions with further internal routers. What is the best way to balance across these 2 links?
--- dan
Use the loopback address on each of the two routers as the bgp origination address and make sure that your router has a route for the loopback address of the far router going over both of the GigE links. Ciscos handle this fine. Others can as well. YMMV. Walt ----- Original Message ----- From: dan <deearekay@gmail.com> Date: Monday, May 7, 2007 10:09 am Subject: Load balancing To: nanog@merit.edu
Hello, I currently have 2 routers with a single gigabit link (and correspondinginternal BGP session) between them. router1 <---------gigabit------->router2
Simple setup. Now that we have reached the limit on this gigabit link, we are adding a second gigabit link between the same 2 routers, and we wish to load balance across them. Traffic is about 5:1 ratio of out:in. router2 has bgp sessions with several upstreams, and router 1 has bgp sessions withfurther internal routers. What is the best way to balance across these 2 links?
--- dan
Read your fine, fine manuals? Every vendor of relevance has a chapter devoted to this topic. On May 7, 2007, at 10:05 AM, dan wrote:
I currently have 2 routers with a single gigabit link (and corresponding internal BGP session) between them. router1 <---------gigabit------->router2
Simple setup. Now that we have reached the limit on this gigabit link, we are adding a second gigabit link between the same 2 routers, and we wish to load balance across them. Traffic is about 5:1 ratio of out:in. router2 has bgp sessions with several upstreams, and router 1 has bgp sessions with further internal routers. What is the best way to balance across these 2 links?
--- dan
-- Jo Rhett senior geek Silicon Valley Colocation Support Phone: 408-400-0550
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 dan wrote:
Hello, I currently have 2 routers with a single gigabit link (and corresponding internal BGP session) between them. router1 <---------gigabit------->router2
Simple setup. Now that we have reached the limit on this gigabit link, we are adding a second gigabit link between the same 2 routers, and we wish to load balance across them. Traffic is about 5:1 ratio of out:in. router2 has bgp sessions with several upstreams, and router 1 has bgp sessions with further internal routers. What is the best way to balance across these 2 links?
Depending on the platforms, etherchannel/port-channel would be a fairly straightforward solution. - -- ========= bep -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGP7FGE1XcgMgrtyYRApnKAKCZgpq4x2jR/Ma0xNWVJBID9KFTVwCfUcqH yq4Bp01i+Bopv8tu8erN5V8= =WoFF -----END PGP SIGNATURE-----
If you choose etherchannel, also spend some minutes reading about the balancing algorithm for your platform. :) On Mon, 7 May 2007, Bruce Pinsky wrote: bep > bep >-----BEGIN PGP SIGNED MESSAGE----- bep >Hash: SHA1 bep > bep >dan wrote: bep >> Hello, bep >> I currently have 2 routers with a single gigabit link (and corresponding bep >> internal BGP session) between them. bep >> router1 <---------gigabit------->router2 bep >> bep >> Simple setup. Now that we have reached the limit on this gigabit link, bep >> we are adding a second gigabit link between the same 2 routers, and we bep >> wish to load balance across them. Traffic is about 5:1 ratio of out:in. bep >> router2 has bgp sessions with several upstreams, and router 1 has bgp bep >> sessions with further internal routers. What is the best way to balance bep >> across these 2 links? bep >> bep > bep >Depending on the platforms, etherchannel/port-channel would be a fairly bep >straightforward solution. bep > bep >- -- bep >========= bep >bep bep > bep >-----BEGIN PGP SIGNATURE----- bep >Version: GnuPG v1.4.4 (MingW32) bep >Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org bep > bep >iD8DBQFGP7FGE1XcgMgrtyYRApnKAKCZgpq4x2jR/Ma0xNWVJBID9KFTVwCfUcqH bep >yq4Bp01i+Bopv8tu8erN5V8= bep >=WoFF bep >-----END PGP SIGNATURE----- bep >
participants (6)
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Bruce Pinsky -
dan -
Jo Rhett -
Mike Lyon -
Nicolás Antoniello -
Walter Prue