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How to configure multiple (primary and secondary) addresses on a VE/physical interface on a VDX and their functionality

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TitleHow to configure multiple (primary and secondary) addresses on a VE/physical interface on a VDX and their functionality
Objective
To configure multiple (primary and secondary) addresses on a VE/physical interface on a VDX and a brief overview about their functionality and implementation.
Environment
  • Network OS
  • VDX
Procedure
  1. An IP address (or a 'primary' IP address) can be configured on a VE/physical interface using:
    VDX(config-rbridge-Ve-1)# ip address 1.1.1.1/24
    OR
    VDX(conf-if-te-1/0/1)# ip address 1.1.1.1/24
  2. A  'secondary' IP address can be configured on a VE/physical interface using:
    VDX(config-rbridge-Ve-1)# ip address 1.1.1.2/24 secondary
    OR
    VDX(conf-if-te-1/0/1)# ip address 1.1.1.2/24 secondary
  3. All IPs configured under the VE/interface would be active and would pass traffic irrespective of being primary/secondary. The IP addresses configured under an interface can be viewed using the command:
    VDX# show ip interface ve 50
    OR
    VDX# show ip interface te 1/0/1
  4. When multiple primary IP address are configured, the IP address with the lowest IP address/number will be displayed when checking the IP address configured with the command:
    VDX# show ip int brief
  5. We cannot have two or more ‘primary’ addresses falling under the same subnet, under the same VE/physical interface. Only one of the addresses in the same subnet can be configured as the ‘primary’ address, while the rest need to configured as ‘secondary’ addresses.
  6. We cannot assign an IP address as ‘secondary’, if there does not exist a primary IP address in the same subnet, under the VE/physical interface. Hence, you would need to configure an IP address in any new subnet as the ‘primary’ address, before configuring more IP addresses in the same subnet as the 'secondary' addresses.
Additional notes

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