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• There are only a couple of MACs for each unit to be transmitted so that all current active MACs can
definitely be carried on the newly defined TLV.
• This TLV is recognizable only by FTOS devices with this feature support. Other device will ignore this
field and should still be able to process other standard TLVs.
The LLDP organizational TLV passes local DA information to peer VLT domain devices so they can act as
proxy gateway. Two configurations are sent to LLDP to enable this feature:
• Global proxy gateway LLDP configuration to enable this feature
• Interface proxy gateway LLDP configuration to enable/disable proxy-gateway LLDP TLV on particular
interfaces
• The interface is typically a port channel which connects to a remote VLT domain.
• The new proxy gateway TLV will be carried on the physical links under the port channel only
• There should be at least one link connects to each unit of the VLT domain
The configuration is complete if these two configurations are applied, with the following prerequisities:
• LLDP must be globally enabled;
• There should not be any interface level LLDP disable CLI on the interfaces configured for proxy
gateway, and both transmission and reception must be enabled;
• Both units of the remote VLT domain must be connected by the port channel member.
• If more than one port is connected to a unit of the remote VLT domain, it has to be completed by the
time proxy gateway LLDP is enabled
• no other conflict configuration (i.e., no static proxy gateway configuration)
This feature might not operate properly if one of the following conditions is true:
• Any proxy gateway configuration or LLDP configuration is not working
• LLDP packets fail to reach to remote VLT domain devices (due to system down, rebooting, port down,
physical link connection)
Sample Configuration Scenario for VLT Proxy Gateway
1. Assume the following topology with C1/D1 part of VLT domain 1 and C2/D2 part of VLT domain 2.
This will undergo sub-optimal routing. The following figure illustrates a sample VLT Proxy gateway
scenario.
VLT Proxy Gateway
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