topic RE: OSPF on ISC port in mlag in ExtremeSwitching (EXOS/Switch Engine)

OSPF on ISC port in mlag

gajanan — Mon, 02 Oct 2017 22:07:00 GMT

Can we run OSPF on isc vlan ? how the fail over will happen if layer 3 link connected to VRRP Master fail and we have only ISC port connection to VRRP backup

RE: OSPF on ISC port in mlag

Jacob__Praveen — Tue, 03 Oct 2017 05:47:00 GMT

The ISC VLAN is only provisioned to carry inter MLAG-peer control traffic and ipforwarding is almost always never enabled on an ISC VLAN. Which layer 3 link are you talking about here?

RE: OSPF on ISC port in mlag

Stephane_Grosj1 — Tue, 03 Oct 2017 14:34:00 GMT

I agree with Jacob, the ISC VLAN cannot be enabled for ipforwarding. However you could have a L3 vlan using the ISC PORTS.

That being said, I'm not sure to understand what you want to do. With MLAG, you can run VRRP in Master/Backup typical state, or use Fabric Routing to act in Master/Master. Losing the ISC connection is always a bad thing, that's why we recommend to have a LAG.

RE: OSPF on ISC port in mlag

gajanan — Tue, 03 Oct 2017 16:33:00 GMT

Hi guys.. thanks for your reply.. appreciate it..i mean Layer 3 connection between vrrp master n backup switch...we had issue last time when isp Link on vrrp master failed and traffic black holed at VRRP master switch as it dint had any l3 connection with vrrp backup

RE: OSPF on ISC port in mlag

Stephane_Grosj1 — Tue, 03 Oct 2017 16:56:00 GMT

Then, what you need is to track the interface and failover VRRP when it's down. Look for VRRP Tracking in the User Guide, to confirm this is what you need.

RE: OSPF on ISC port in mlag

gajanan — Tue, 03 Oct 2017 17:44:00 GMT

thanks for ur reply..we have decided to use dedicated layer 3 connection between vrrp master and backup