- Community Home
- >
- Networking
- >
- Switching and Routing
- >
- Web and Unmanaged
- >
- Re: In V1910 DHCP relay agent drops option 82 inse...
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Discussions
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
03-01-2012 06:20 AM
03-01-2012 06:20 AM
In V1910 DHCP relay agent drops option 82 inserted by DHCP snooping
Hello,
I'm trying to use dhcp snooping with option 82 insertion on V1910-48G switch.
And it does it OK when dhcp clients and dhcp server are on the same VLAN.
Dhcp server gets request with option 82: agent.remote-id contains switch
MAC address and agent.circuit-id contains VLAN and port IDs.
When I move dhcp server to another VLAN and turn on dhcp relay, It receives
requests from the same clients without dhcp option 82.
What's wrong?
- Tags:
- DHCP
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
03-04-2012 01:36 AM - edited 03-04-2012 01:37 AM
03-04-2012 01:36 AM - edited 03-04-2012 01:37 AM
Re: In V1910 DHCP relay agent drops option 82 inserted by DHCP snooping
I havent seen the V1910, but H3C lowend switches defaults to not relaying opt82. Try this:
dhcp relay information enable dhcp relay information strategy keep
CCIE Service Provider
MASE Network Infrastructure [2011]
H3CSE
CCNP R&S
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
03-05-2012 07:31 AM - edited 03-05-2012 07:39 AM
03-05-2012 07:31 AM - edited 03-05-2012 07:39 AM
Re: In V1910 DHCP relay agent drops option 82 inserted by DHCP snooping
Unfortunately in V1910 the only actions available from CLI are:
initialize Delete the startup configuration file and reboot system ipsetup Specify the IP address of the VLAN interface 1 password Specify password of local user ping Ping function quit Exit from current command view reboot Reboot system summary Display summary information of the device. upgrade Upgrade the system boot file or the Boot ROM program
and DHCP Relay configuration page doesn't have appropriate options.
The only place where option 82 is mentioned is DHCP Snooping per-port configuration:
Interface State: Trust/Untrust Option 82 Support: Enable/Disable Option 82 Strategy: Drop/Keep/Replace
On client ports it's Untrust-Enable-Replace, on uplink port, where DHCP server sits - Trust-Disable-Replace, but it doesn't really matter.
By the way, HP V1910-48G is former 3Com BaselinePlus 2952, not H3C.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-07-2014 07:16 PM
10-07-2014 07:16 PM
Re: In V1910 DHCP relay agent drops option 82 inserted by DHCP snooping
Hmm... These were affordable switches for setup with my home lab in the basement. I have cisco switches as well but they are primarly relegated to my test network and not production. As it goes configuring DHCP Snooping and the No Option 82 command are quite trivial on my layer 3 cisco 3560's however Skif raises a valid concern as I would like to make sure I can disable the option 82 globally before enabling DHCP Snooping. My DHCP Server is a raspberry pie on a different network and I want to ensure that there will not be issues before I enable this. Any progress on this or is it what I can expect from a sudo layer 3 switch.