[nsp] Dynamic load balancing outgoing traffic (unequal paths)

Noriega, Alejandro ANoriega at prima.com.ar
Mon Jul 19 10:06:09 EDT 2004


Thanks for the information Nicolaj !
I read the link and searched about this feature but it doesn't talk much
about how the weighting works. I only found this:
"Use the weighted method of GLBP load balancing when you need unequal
load balancing because routers in the GLBP group have different
forwarding capacities." 

Can I do load balancing of my outgoing traffic with different upstreams
bandwidths with this feature?
This works like eIGRP variance?

Thanks,
Alejandro.

-----Original Message-----
From: Nicolaj Ottsen [mailto:no at webpartner.dk] 
Sent: Monday, July 19, 2004 10:32 AM
To: Noriega, Alejandro; cisco-nsp at puck.nether.net
Subject: RE: [nsp] Dynamic load balancing outgoing traffic (unequal
paths)



Since you have 3 upstream routers the solutions you suggest could become
very complex, espcialy when you need to coordinate with multiple
providers.

You could use glbp
(http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature
_guide09186a00801541c8.html ) instead, it supports Weighting. Or use
multiple HSRP groups to "manualy" share the load between your routere.

GLBP is preferred since all you servers will share the same gateway. 

Nicolaj Ottsen

-----Original Message-----
From: Noriega, Alejandro [mailto:ANoriega at prima.com.ar] 
Sent: 19. juli 2004 14:57
To: cisco-nsp at puck.nether.net
Subject: [nsp] Dynamic load balancing outgoing traffic (unequal paths)
Importance: High

Hello guys,
	I'm looking for a scalability solution for dynamic load
balancing the outgoing traffic of my ISP with unequal bandwidth paths. I
have 3 upstream with theirs respective bandwidth: 60, 200 and 120 Mbps
each one in separate routers which are acting like route reflector
clients.

I was thinking in this solutions:
	.- Injecting a default route from the RR-clients to my RR via
eIGRP and using variance (I don't know if this could work).
	.- Reading about BGP Link Bandwidth in this case I may work with
my upstream.
	.- And loosing the dynamic conf: full routing setting different
weights to a set of routes between my upstream.

Any idea?

Thanks in advance.

Regards,
Alejandro.

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