Users Guide

• Any proxy gateway configuration or LLDP configuration is not working.
• LLDP packets fail to reach the remote VLT domain devices (for example, because the system is down, rebooting, or the port physical
link connection is down).
Figure 134. Sample Configuration for a VLT Proxy Gateway
• The above figure shows a sample VLT Proxy gateway scenario. 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 with the VLT Proxy Gateway LLDP
method. 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
Dell(conf-vlt-domain)#proxy-gateway lldp
Dell(conf-vlt-domain-pxy-gw-lldp)#vlt-peer-mac transmit
• Assume the inter-chassis link (ICL) between C1 and D1 is shut and if D1 is the secondary VLT, one half of the inter DC link goes down.
After VM motion, if a packet reaches D2 with the destination MAC address of D1, 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.
• You can disable the VLT Proxy Gateway for a particular VLAN using an "Exclude-VLAN" configuration. The configuration has to be
done in both the VLT domains [C and D in VLT domain 1 and C1 and D1 in VLT domain 2].
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VLT Proxy Gateway