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Connecting a VLT Domain to an Attached Access Device (Switch or
Server)
To connect a VLT domain to an attached access device, use the following commands.
On a VLT peer switch: To connect to an attached device, congure the same port channel ID number on each peer switch in the VLT
domain.
1 Congure the same port channel to be used to connect to an attached device and enter interface conguration mode.
CONFIGURATION mode
interface port-channel id-number
2 Remove an IP address from the interface.
INTERFACE PORT-CHANNEL mode
no ip address
3 Place the interface in Layer 2 mode.
INTERFACE PORT-CHANNEL mode
switchport
4 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:
• For a 1-GigabitEthernet interface, enter the keyword GigabitEthernet then the slot/port information.
• For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port information.
5 Ensure that the port channel is active.
INTERFACE PORT-CHANNEL mode
no shutdown
6 Associate the port channel to the corresponding port channel in the VLT peer for the VLT connection to an attached device.
INTERFACE PORT-CHANNEL mode
vlt-peer-lag port-channel id-number
7 Repeat Steps 1 to 6 on the VLT peer switch to congure 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, congure a port channel. For an example
of how to verify the port-channel conguration, refer to VLT Sample Conguration.
To congure 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 conguration ensures the DHCP discover packets are forwarded to the VLAN that has the DHCP server.
Conguring a VLT VLAN Peer-Down (Optional)
To congure a VLT VLAN peer-down, use the following commands.
1 Enter VLT-domain conguration mode for a specied VLT domain.
CONFIGURATION mode
vlt domain domain-id
Virtual Link Trunking (VLT)
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