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Secondary Addresses

Looking to know if a secondary address will automatically become the primary if a primary address also configured on a FastEthernet LAN port is removed, or will it be removed as well?

!

interface FastEthernet0/0

ip address 10.24.216.1 255.255.248.0 secondary

no ip address 10.40.80.1 255.255.248.0

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: Secondary Addresses

The primary can't be removed unless all the secondaries are removed first. If you try to remove the primary, you will get the following message:

R1(config-if)#no ip address 192.168.1.1 255.255.255.0

Must delete secondary before deleting primary

R1(config-if)#

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
1 REPLY
Cisco Employee

Re: Secondary Addresses

The primary can't be removed unless all the secondaries are removed first. If you try to remove the primary, you will get the following message:

R1(config-if)#no ip address 192.168.1.1 255.255.255.0

Must delete secondary before deleting primary

R1(config-if)#

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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