Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

Pix OSPF load balancing question

I have a pix 515e with two default routes, learned via OSPF from two routers on the "outside" interface.

Currently router#2 is being preferred way much more than router#1. There are many thousands of destinations for the traffic. These two routers are further doing NAT to nat rfc1918 ip's to the internet (the pix is NOT doing nat)

Can someone please let me know how the PIX does load balancing? is it by IP address destination? is it something else?

thanks,

Joe

1 ACCEPTED SOLUTION

Accepted Solutions
New Member

Re: Pix OSPF load balancing question

Per TAC:

"the PIX will do per-destination Load Balancing instead of per packet

load balancing. The algorithm will look at the source and destination

addresses. It does not do 1:1 load balancing. Given enough different

source and destination addresses, the packets will more or less reach a

50/50 spit between the two next-hops. However, in real world testing

with the same source and destination addresses, it may not reach an even

load balancing."

2 REPLIES
Silver

Re: Pix OSPF load balancing question

The pix does not do load balancing. Your only option would be to configure the upstream routers to load balance.

Thanks,

Chad

New Member

Re: Pix OSPF load balancing question

Per TAC:

"the PIX will do per-destination Load Balancing instead of per packet

load balancing. The algorithm will look at the source and destination

addresses. It does not do 1:1 load balancing. Given enough different

source and destination addresses, the packets will more or less reach a

50/50 spit between the two next-hops. However, in real world testing

with the same source and destination addresses, it may not reach an even

load balancing."

118
Views
0
Helpful
2
Replies
CreatePlease to create content