Administrator Guide

• LLDP packets fail to reach the remote VLT domain devices (for example, because the system is down, rebooting, or the port’s physical
link connection is down).
LLDP VLT Proxy Gateway in a Square VLT Topology
Figure 141. Sample Configuration for a VLT Proxy Gateway
• The preceding figure shows a sample square VLT Proxy gateway topology. There are no diagonal links in the square VLT connection
between the C and D in VLT domain 1 and C1 and D1 in the VLT domain 2. This causes sub-optimal routing. For VLT Proxy Gateway to
work in this scenario you must configure the VLT-peer-mac transmit command under VLT Domain Proxy Gateway LLDP mode,
in both C and D (VLT domain 1) and C1 and D1 (VLT domain 2). This behavior is applicable only in the LLDP configuration and not
required in the static configuration.
Sample Configuration
DellEMC(conf-vlt-domain)#proxy-gateway lldp
DellEMC(conf-vlt-domain-pxy-gw-lldp)#vlt-peer-mac transmit
• Assume the inter-chassis link (ICL) between C1 and D1 is shutdown and if D1 is the secondary VLT, one half of the inter DC link goes
down. After VM motion, if a packet reaches D1 with the destination MAC address of D, it may be dropped. This behavior is applicable
only in an LLDP configuration; in a static configuration, the packet is forwarded.
• Any L3 packet, when it gets an L3 hit and is routed, it has a time to live (TTL) decrement as expected.
VLT Proxy Gateway
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