For details on cookie usage on our site, read our Privacy Policy
Active/Active ECMP
- LIVEcommunity
- Discussions
- General Topics
- Re: Active/Active ECMP
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Printer Friendly Page
Active/Active ECMP
- Mark as New
- Subscribe to RSS Feed
- Permalink
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.
- Mark as New
- Subscribe to RSS Feed
- Permalink
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.
- Mark as New
- Subscribe to RSS Feed
- Permalink
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.
- Mark as New
- Subscribe to RSS Feed
- Permalink
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?
- Mark as New
- Subscribe to RSS Feed
- Permalink
08-07-2019 09:44 AM
Cat9500s not stacked, no VSS, no Nexus core running active/active HSRP. So doesnt qualify.
- Mark as New
- Subscribe to RSS Feed
- Permalink
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)....
- failing back to primary FW and short loss of ISP connection in General Topics
- ECMP in General Topics
- Two Static Route - same destination, Same metric in General Topics
- Palo Alto Dual ISP, ECMP enables the external interfaces and enables IPSEC VPN tunnels in General Topics
- Palo's behaviour as a Route reflector in General Topics
Show your appreciation!
Click Accept as Solution to acknowledge that the answer to your question has been provided.
The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!
These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!
The LIVEcommunity thanks you for your participation!
