topic ELRP and Role-Based Policy in ExtremeSwitching (EXOS/Switch Engine)

ELRP and Role-Based Policy

DKaufmann — Mon, 25 Jan 2021 15:02:59 GMT

Hi there,

we use ELRP to prevent loops.

For ths reason, I added the following command for all static configured vlans:
configure elrp-client periodic VLAN_NAME ports all disable-port egress log-and-trap

Furthermore, I’ve configuered ELRP for dynamic vlans:

configure elrp-client dynamic-vlans netlogin client-ports on

In our case, we you role-based policy and the switch has about 10 more vlans, which are created by the policy manager.

Is ELRP activated on this VLANs as well?

Cheers,

Daniel

Re: ELRP and Role-Based Policy

OscarK — Mon, 25 Jan 2021 15:25:20 GMT

I think ELRP is not enabled on vlans created by policy. I found an open feature request that is not implemented on this. I would go to your Sales Engineer and ask for this feature.

If netlogin assings a vlan that does not exist it will be used by elrp.

Re: ELRP and Role-Based Policy

Stefan_K_ — Mon, 25 Jan 2021 16:50:24 GMT

Hi Daniel,

I also tried to implement this for dynmic vlans, but without luck, but it might even be better this way. Keep in mind that it will create very much traffic if you enable ELRP on all VLANs. In my case 80% of total network traffic was ELRP. Maybe activating ELRP on all VLANs (around 100) on all Ports (40+ switches on campus) was a bit too much. 🙂

I ended up with creating a seperate VLAN just for ELRP and tagging this on all client-ports.

Regards
Stefan