no-attribute-length-in-pdu

Syntax

Hierarchy Level

Description

Include an extra byte in protocol data units (PDUs) sent by the Multiple VLAN Registration Protocol (MVRP). You can disable the extra byte to address a compatibility issue between MVRP in Junos OS Releases 13.2 and later for EX Series switches with support for the Enhanced Layer 2 Software (ELS), which includes the extra byte, and MVRP in Junos OS Releases 11.3 and later for EX Series switches that do not support ELS, which does not include the extra byte. If this compatibility issue arises, the ELS version of MVRP does not recognize PDUs without the extra byte sent by the non-ELS version of MVRP.

You can recognize an MVRP version compatibility issue by observing the switch running the ELS version of MVRP. Because a switch running the ELS version of MVRP cannot interpret an unmodified PDU from a switch running the non-ELS version of MVRP, the switch will not add VLANs from the non-ELS version of MVRP. When you execute the command show mvrp statistics in the ELS version of MVRP, the values for Received Join Empty and Received Join In will incorrectly display zero, even though the value for the Received MVRP PDUs without error has been increased. Another indication that MVRP is having a version compatibility issue is that unexpected VLAN activity, such as multiple VLAN creation, takes place on the switch running the ELS version of MVRP.

Required Privilege Level

routing—To view this statement in the configuration.routing control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 13.2X50-D10.