Active/Standby connection for a 3800 series?

Answered Question
Oct 30th, 2008
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What is the command to make my second eth port standby? I have to have fault redundant connection for the 3800 utulizing the second eth port.


My current config is:


interface GigabitEthernet0/0

description SwitchPort xx

ip address 172.19.20.15 255.255.255.224

duplex auto

speed auto

media-type rj45

!

interface GigabitEthernet0/1

no ip address

shutdown

duplex auto

speed auto

media-type rj45



Thanks much!


Correct Answer by pkaretnikov about 8 years 7 months ago

From a Q&A on the 3800

http://www.cisco.com/en/US/prod/collateral/routers/ps5855/prod_qas0900aecd8016a953.html


Q. Is Cisco EtherChannel® supported on the two onboard Gigabit Ethernet ports?

A. No. Cisco EtherChannel is not supported on the onboard Gigabit Ethernet ports. Instead, Cisco EtherChannel can be configured on Gigabit Ethernet HWICs, Gigabit Ethernet network modules, and Fast Ethernet ports on Cisco EtherSwitch HWICs and network modules when the ports are in switchport mode.




So etherchannel isn't an option with the two builtin ports.

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John Blakley Thu, 10/30/2008 - 12:13
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Are these going to be used as gateways for hosts or are you needing failover for internet traffic outbound?


--John

Joseph W. Doherty Thu, 10/30/2008 - 16:02
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Normally you can't configure two of the same devices on the same subnet. However, the 3800 supports manual Etherchannel or you can route across both links.

Tommer Catlin Thu, 10/30/2008 - 19:00
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how would I go about configuring this?


Thanks!

Correct Answer
pkaretnikov Thu, 10/30/2008 - 20:57
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From a Q&A on the 3800

http://www.cisco.com/en/US/prod/collateral/routers/ps5855/prod_qas0900aecd8016a953.html


Q. Is Cisco EtherChannel® supported on the two onboard Gigabit Ethernet ports?

A. No. Cisco EtherChannel is not supported on the onboard Gigabit Ethernet ports. Instead, Cisco EtherChannel can be configured on Gigabit Ethernet HWICs, Gigabit Ethernet network modules, and Fast Ethernet ports on Cisco EtherSwitch HWICs and network modules when the ports are in switchport mode.




So etherchannel isn't an option with the two builtin ports.

Tommer Catlin Thu, 10/30/2008 - 22:34
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basically then, I would need to configure something on the switch for this type of redundancy correct?

Tommer Catlin Fri, 11/07/2008 - 07:30
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Sorry I forgot to rate your message. That's what I was looking for. Thanks much! I guess I will need to purchase the HWICs for this to work. I do not see any other way around this.

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