Redundent Subinterface setup on ASA 5510

Unanswered Question
Oct 28th, 2008

when i try to configure redundant sub interfaces, i receive the following error.

ASA1(config)# interface Redundant 1.2


ERROR: % Invalid input detected at '^' marker.


anyone have any suggestions

Cisco Adaptive Security Appliance Software Version 8.0(4)

Device Manager Version 6.1(3)

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Loading. Tue, 10/28/2008 - 06:45


The number of redundant interface is a number between 1 and 8.

I hope this helps.

Best regards.


dphills18 Tue, 10/28/2008 - 07:21

But my intent is to setup sub-interfaces. You are suppose to be able to setup a maximum of 8 redundant interfaces. the ASA only have 5 physical interfaces (including management). So how can you setup 8 interfaces without using sub-interfaces.

dphills18 Tue, 10/28/2008 - 07:23

ASA(config)# int e0/0.1600

ASA(config)# int redundant 1

ASA(config-if)# member-interface e0/0.1600


ERROR: % Invalid input detected at '^' marker.

ASA(config-if)# member-interface e0/0

ERROR: member interface must not have a sub-interface.

dphills18 Tue, 10/28/2008 - 08:17

Never mind. I just figured it out. What needs to happen is you need to create the redundant interface first. Add the member interfaces. Then you are able to create the sub-interfaces for the redundant interfaces. See below:

ASA(config)# int redundant 2

ASA(config-if)# member-interface e0/3

INFO: security-level and IP address are cleared on Ethernet0/3.

ASA(config-if)# member-interface e0/2

INFO: security-level and IP address are cleared on Ethernet0/2.

ASA(config-subif)# int redundant 2.2

ASA(config-subif)# vlan 2

ASA(config-subif)# nameif DMZ

INFO: Security level for "DMZ" set to 0 by default.

ASA(config-subif)# security 30

ASA(config-subif)# ip address

ASA(config-subif)# sh run int red 2.2


interface Redundant2.2

vlan 2

nameif DMZ

security-level 30

ip address



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