Extreme Loop Recovery Protocol (ELRP) on Dynamic VLANs

Extreme Loop Recovery Protocol (ELRP) is a proprietary protocol that detects network loops at Layer 2. ELRP sends a special PDU over the VLAN and detects a loop if the sender switch receives the same PDU back. Previously, only static VLANs were supported.

ELRP on NetLogin-enabled ports is supported.

Starting with ExtremeXOS 22.2, ELRP supports dynamically created VLANs created by:

NetLogin
Extreme Network Virtualization (XNV)
Multiple Registration Protocol (MVRP)

For ELRP over dynamic VLANs, the ingress port on which the ELRP packet is received back is disabled for 30 seconds after which it is again enabled and ELRP packets are sent out on the port again. If again a loop is detected, the cycle repeats.

Supported Platforms

Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X870, X440-G2, X620 series switches.

New CLI Commands

configure elrp-client dynamic-vlans {mvrp | netlogin | vm-tracking | all} [on | off] {client-ports | uplink-ports | both}