07-20-2019 09:45 AM
I have two Palo Alto 5250s running in my core network as a core firewall for all campus and datacetner traffic. They are running active/active. I have layer 3 routing south bound to two cat9500s not in VSS. So I am running HSRP on each 9500 alternating vlans to utilize them both. All 4 units are running OSPF to advertise loopbacks and iBGP is used to carry routes. The 9500s are setup for ECMP and so are the Palo Altos. I feel like there is some weird traffic issues with this, Should the Palo Altos even be setup with ECMP? If so should I be using the symetrical return option? Would having ECMP on the Cat9500s be enough to achieve load sharing/balancing over each layer 3 link to each Palo Alto? Each cat 9500 has a layer 3 link to each Palo Alto. And yes before people tell me Active/Active is not a good idea I cant see why not when my network is symetrical.
08-07-2019 09:34 AM
ECMP should still work as long as you remove HSRP regardless of router ID for "Equal Cost Paths" only.
08-07-2019 09:36 AM
Not running active/active for increase performance because I know you get maybe 20% on that. I am using it because I have two active core switches and it becomes a load share game. Do ditch HSRP and use what for LAN side? thats the real challenge.
08-07-2019 09:43 AM - edited 08-07-2019 09:45 AM
MC-LAG? Not sure the new 9500s support that. Are you avoiding stacking them for any specific reason?
08-07-2019 09:44 AM
Cat9500s not stacked, no VSS, no Nexus core running active/active HSRP. So doesnt qualify.
08-07-2019 09:46 AM
Now, I am fantasizing here, but I thought about running HSRP egress side to the palos and running palos with floating IP (essentially vrrp)....
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