04-18-2012 04:35 AM - edited 03-07-2019 06:11 AM
Hello,
I have a new catalyst 2960,and i want to enable DHCP SNOOPING,but,it doesn't work,the server is stilling offert addresses IP and it's not connected in a trusted port,the schema is very simple:
1 switch catalyst 2960 PST-S,1 server dhcp and 1 pc client,the PC and the server are in VLAN 10,DHCP SNOOPING is enabled in all ports and no port is trusted,but the client get addresse IP after retyping ipconfig /release and ipconfig /renew in dos commande.the configuration and the version of the switch are in the file attached.
I tested the same configuration in a catalyst C3560-24PS and DHCP SNOOPING work normally,i tested in other catalyst 2960-PST-S,but the same probléme:DHCP SNOOPING without effect,the commands typed is:
ip dhcp snnoping
ip dhcp snooping vlan 10
thank you for your help.
Solved! Go to Solution.
04-18-2012 05:32 AM
Hi Brahim,
From the link below , I understand that DHCP snooping is available for lan lite starting 12.2(55)SE, even though on the feature navigator I did not see the feature on any lan lite image
DHCP Snooping (including option 82) support in LAN Lite (2960 and 2960-S only): Support for the DHCP Snooping feature, previously available only in the LAN Base feature set (or better), is now available in LAN Lite as well.
Dan
04-18-2012 05:32 AM
Hi Brahim,
From the link below , I understand that DHCP snooping is available for lan lite starting 12.2(55)SE, even though on the feature navigator I did not see the feature on any lan lite image
DHCP Snooping (including option 82) support in LAN Lite (2960 and 2960-S only): Support for the DHCP Snooping feature, previously available only in the LAN Base feature set (or better), is now available in LAN Lite as well.
Dan
04-18-2012 08:56 AM
Thank You,i'm going to upgrade my IOS from 12.2(50)SE5 to 12.2.58-SE2 (latest IOS),and a test if that's ok.
thank you sir.
bennaji
04-18-2012 01:00 PM
Bennaji,
I am very curios to know the result. From feature list of the images it seams that only lan base has this option, although from the link that I provided, starting with the version 55SE is also supported on lan lite. Sadly I do not have a 2960 for testing purpose.
Dan
04-19-2012 07:40 AM
Dan,
The test is OK,now and after upgrading the IOS to 12.2.58-SE2 of the new catalyst 2960,DHCP SNOOPING work good,now i have to upgrade twoo older catalyst 2960 to confirme that dhcp snooping is ok,but now the first result is OK :-) .
thank you Dan for your help.
04-19-2012 07:58 AM
Hi Bennaji,
Good to hear that.
Thanks for the update
Dan
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