topic Re: ELRP implementation question in ExtremeSwitching (EXOS/Switch Engine)

ELRP implementation question

Kar_Del_Moral — Wed, 30 Sep 2020 04:47:48 GMT

Hello…

Is it o.k. if I only configure one specific vlan for ELRP implementation accros all my devices and just tag the ports to it (excluding the uplinks)? Is there like a “Best practice” document to implemented for loop protection?

Thanks

Re: ELRP implementation question

CThompsonEXOS — Wed, 30 Sep 2020 04:54:52 GMT

Hi Karina,

The articles below may be helpful:

https://gtacknowledge.extremenetworks.com/articles/Q_A/do-I-need-to-enable-ELRP-on-all-the-VLANs-where-physical-ports-are-identical

I would recommend adding the uplink ports to your elrp configuration but making sure they do not get disabled.

configure elrp-client disable-port exclude <UPLINK PORTS>

Thanks,

Chris Thompson

Re: ELRP implementation question

Stefan_K_ — Wed, 30 Sep 2020 15:03:21 GMT

I do it like this since a short time since this greatly reduces the multicast traffic in bigger environments. I would also tag the ELRP-VLAN to the Uplink, but don’t enable ELRP on this port.

On the aboive switch (Distribution/Core Switch) I would also create the same ELRP-VLAN, tag it to all ports (downlinks) and enable ELRP for this VLAN (but maybe without port-disable). That way you can detect loops that are patched across different switches.

Regards
Stefan