Administrator Guide

INTERFACE PORT-CHANNEL mode
vlt-peer-lag port-channel id-number
The valid port-channel ID numbers are from 1 to 128.
7. Repeat Steps 1 to 6 on the VLT peer switch to configure the same port channel as part of the VLT domain.
8. On an attached switch or server: To connect to the VLT domain and add port channels to it, configure a port channel. For
an example of how to verify the port-channel configuration, refer to VLT Sample Configuration.
To configure the VLAN where a VLT peer forwards received packets over the VLTi from an adjacent VLT peer that is down, use
the peer-down-vlan parameter. When a VLT peer with BMP reboots, untagged DHCP discover packets are sent to the peer
over the VLTi. Using this configuration ensures the DHCP discover packets are forwarded to the VLAN that has the DHCP
server.
Configuring a VLT VLAN Peer-Down (Optional)
To configure a VLT VLAN peer-down, use the following commands.
1. Enter VLT-domain configuration mode for a specified VLT domain.
CONFIGURATION mode
vlt domain domain-id
The range of domain IDs is from 1 to 1000.
2. Enter the port-channel number that acts as the interconnect trunk.
VLT DOMAIN CONFIGURATION mode
peer-link port-channel id-number
The range is from 1 to 128.
3. Enter the VLAN ID number of the VLAN in which the ICL needs to be untagged when ICL hellos from the other peer are
stopped. When the BMP server is connected to a non-default VLAN, the system forwards BMP traffic via ICL through that
configured VLAN when one of the peers gets rebooted.
VLT DOMAIN CONFIGURATION mode
peer-link port-channel id-number peer-down-vlan vlan interface-number
The range is from 1 to 4094.
Configuring Enhanced VLT (eVLT) (Optional)
To configure enhanced VLT (eVLT) between two VLT domains on your network, use the following procedure.
For a sample configuration, refer to eVLT Configuration Example. To set up the VLT domain, use the following commands.
1. Configure the port channel to be used for the VLT interconnect on a VLT switch and enter interface configuration mode.
CONFIGURATION mode
interface port-channel id-number
Enter the same port-channel number configured with the peer-link port-channel command in the Enabling VLT and
Creating a VLT Domain.
2. Add one or more port interfaces to the port channel.
INTERFACE PORT-CHANNEL mode
channel-member interface
interface: specify one of the following interface types:
● 1 Gigabit Ethernet: enter gigabitethernet slot/port.
● 10 Gigabit Ethernet: enter tengigabitethernet slot/port.
● 40-Gigabit Ethernet: Enter fortyGigE slot/port.
3. Enter VLT-domain configuration mode for a specified VLT domain.
CONFIGURATION mode
vlt domain domain-id
The range of domain IDs is from 1 to 1000.
Virtual Link Trunking (VLT)
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