Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Two questions about SG300 DHCP server

Hi,

I have two questions about the DHCP server on the SG300:

  1. On the Address Binding page, what does the "Declined" state mean? I have a NAS device that won't pull an address, and I think that the entry with a state of "Declined" corresponds to this device. It was previously pulling an address from a RV180, so the only difference is that it is now connected to the SG300. I worked around this by manually setting the address on the NAS device, but this won't scale if I run into a lot of other devices that can't pull an address.
  2. I configured a static address binding for a WAP321 and found that instead of pulling the configured address that it pulled a dynamic address. I checked the Address Binding page and see that the dynamic entry that corresponds with the WAP321 has a Client Identifier rather than a MAC address. I changed the static entry for the WAP321 to use the client identifier displayed in the dynamic entry, and now the WAP321 pulls the configured static address. Is this expected behavior?

Thanks,

Bob

4 REPLIES
Green

Two questions about SG300 DHCP server

Hi Robert, for some reason the text on your question is garbled. Can you post the questions again?

The answer to the first inquiry I believe is the host attempting to receive DHCP send an ACK back for decline for the DHCP message.

-Tom
Please mark answered for helpful posts
http://blogs.cisco.com/smallbusiness/

-Tom Please mark answered for helpful posts http://blogs.cisco.com/smallbusiness/
New Member

Two questions about SG300 DHCP server

Hi Tom,

Thanks for the quick reply!

My second question is about an issue I am seeing with my WAP321.

If I statically bind an address to the WAP321's MAC address it will pull a dynamic address rather than the statically assigned one. If I update the static address binding to use the WAP321's client identifier it will then pull the statically bound address. Is the expected behavor? So far, my WAP321 is the only device I've had this issue with.

Thanks,

Bob

Green

Two questions about SG300 DHCP server

With the SX300/500 it is required the client identifier, it doesn't automatically insert it. If static DHCP is made on the switch and you didn't need client identifier, that is more or less fortunate behavior for you

So to answer this question, the expected behavior is to configure client identifier for static DHCP entry.

-Tom
Please mark answered for helpful posts
http://blogs.cisco.com/smallbusiness/

-Tom Please mark answered for helpful posts http://blogs.cisco.com/smallbusiness/
New Member

Two questions about SG300 DHCP server

I understand that each static address entry has to have a MAC address or a client identifier so that the DHCP server knows who it is talking to. What I don't understand is why I can use a MAC for every device I have tried so far, except for the WAP321. The only way I can get a static address for the WAP321 is to use its client identifier. If I use the WAP321's MAC address I donn't get the static address I configured. I get a dynamic address instead.

Thanks,

Bob

147
Views
0
Helpful
4
Replies