OS6200 DHCP Snooping Don't Working Good - Alcatel Unleashed

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OS6200 DHCP snooping don't working good

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Search Advanced search 6 posts • Page 1 of 1 nikolami

OS6200 DHCP snooping don't working good

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Post by nikolami » 14 Mar 2011 12:56

Hello, I tested DHCP snooping option on OS6200 and OS6600 (separately). On one switch, in the same VLAN 40, are connected DHCP server and client (PC). On OS6200 switch snooping working partially - PC client is not able to get IP address. But when port on which DHCP server is connected is configured as trust the situation remains the same. Software version is the newest one (1.7.1.7). Configuration for DHCP clients: OS6248P_->(config)# ip dhcp snooping OS6248P_->(config)# ip dhcp snooping vlan 40 OS6248P_->(config)# ip dhcp snooping information option allowed-untrusted Port for DHCP server: OS6248P_->(config)# interface ethernet e13 OS6248P_->(config-if)# ip dhcp snooping trust On OS6600 DHCP snooping don't preventing DHCP server at all. In every situation DHCP client gets IP address from server. Release 5.4.1.R01 is mandatory for DHCP Snooping since 5.1.6 don't support this feature. per switch: OS6600P24_-> ip helper dhcp-snooping enable OS6600P24_-> ip helper dhcp-snooping option-82 data-insertion enable or per VLAN: OS6600P24_-> ip helper dhcp-snooping option-82 data-insertion enable OS6600P24_-> ip helper dhcp-snooping vlan 40 On OS6600 DHCP snooping per switch and per VLAN are mutually exclusive, but on OS6200 must be configured both?! OS6600P24_-> ip helper dhcp-snooping vlan 40 ERROR: Switch and VLAN based DHCP Snooping are mutually exclusive Does anyone have experience with DHCP snooping on Alcatel OmniSwitches? What is the situation on newer AOS switches (OS6850, OS6250)? Regards, Nikolami Top benny

Re: OS6200 DHCP snooping don't working good

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Post by benny » 18 Mar 2011 11:09

Hi Nikolami, I don't have experience with "dhcp snooping" on OS6200 but wanted to let you know that AOS 6.4.4.R01 will contain new options for dhcp snooping (IP SRC filter options etc). I'll look into that and maybe write an article on that once I have time. -benny Top nikolami

Re: OS6200 DHCP snooping don't working good

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Post by nikolami » 23 Mar 2011 12:40

Thank you Benny for info. I hope that someone has experience with configuring DHCP snooping on AOS switch (OS6600, OS6850 or OS6250) and on OS6200. Because I faced with problems on both Alcatel's platforms with "DHCP Snooping" functionality. Regards, nikolami Top Bunleang Meng

Re: OS6200 DHCP snooping don't working good

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Post by Bunleang Meng » 20 Nov 2018 03:40

I have problem with DHCP snooping also when i do ip helper dhcp-snooping enable ip helper dhcp-snooping binding enable ip helper dhcp-snooping ip-source-filter port 1/1-48 enable (Connect to end device) ip helper dhcp-snooping port 1/50 trust (uplink) all pc client not receive dhcp form dhcp server ? Top silvio Alcatel Unleashed Certified GuruAlcatel Unleashed Certified Guru Posts: 2088 Joined: 01 Jul 2008 10:51 Location: Germany

Re: OS6200 DHCP snooping don't working good

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Post by silvio » 21 Nov 2018 11:55

Your AOS-commands are in the total wrong Board.... Please post it again with your correct switch. Than change you second line to "ip helper dhcp-snooping binding persistency enable" and post the output of:

Code: Select all

> show ip helper dhcp-snooping binding > show ip helper dhcp-snooping port > show configuration snapshop ip-helper regards Silvio Top Barrykeery

OS6200 DHCP snooping dont working good

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Post by Barrykeery » 11 Jul 2019 09:19

Are you saying that my other 4 scopes need teh option 43 and NOT the VIOIP VLAN?? Do i need to add 125 and 128 as well? If so they have never been there. Top Post Reply
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