IPv6 DHCP Renew timer

[Federico Olivieri]

Hi All,

I have a Dialer interface that receive a prefix delegation from my ISP

887VA#show ipv6 dhcp interface
Dialer1 is in client mode
Prefix State is OPEN
Renew will be sent in 00:22:36
Address State is IDLE
List of known servers:
Reachable via address: FE80::A2F3:E4FF:FE15:801
DUID: 00030001A0F3E4150801
Preference: 0
Configuration parameters:
IA PD: IA ID 0x000C0001, T1 1800, T2 2880
Prefix: 2A02:C7D:CA1B:A700::/56
preferred lifetime 3600, valid lifetime 7200
expires at Oct 31 2015 05:34 PM (6756 seconds)
Information refresh time: 0
Prefix name: NODE-PD
Prefix Rapid-Commit: disabled
Address Rapid-Commit: disabled

I was wondering if there is any way to change the RENEW timer on my cisco. Has happened that because my ADSL was down, the router didn't send the RENEW and my subnet is changed

Thank you!

[Seb Rupik]

Hi there,

The RENEW value is derived from the T1 value sent in the IA_NA option (https://tools.ietf.org/html/rfc3315#section-22.4). As your router is the client in this scenario you cannot alter it.

You can however release and renew your lease:

enable
clear ipv6 dhcp client dialer 1

cheers,

Seb.