DHCP Address reservations ignored?

[dtd41]

This is an unmanaged switch connected to a GS105 unmanaged switch. I have two questions: (1) On the link between the GS108 and the host The left light is green, the right not light; (2) Anything to be done?

When I first connected this host to the GS105 (its about 100 ft away connected with a cat6 cable) it all worked. When I added the GS108 (same room with the host) DHCP stopped working and the host acts the same with or with the local switch. Setting a static IP works fine with no errors

[schumaku · Accepted solution]

This is a short part borrowed fro the GS105(v5) Installation Guide, very similar in the GS108(v4) Installation Guide - only the left LED indicates a 100 Mb/s (Fast Ethernet) link only. On a complete and healthy cable, a Gigabit Ethernet (1000 Mb/s) must be established.

Hard to say what is killing the DHCP process here ...

[dtd41]

First sentence is wrong should read on the link between the two switches - sorry 😞  

[schumaku · Accepted solution]

This is a short part borrowed fro the GS105(v5) Installation Guide, very similar in the GS108(v4) Installation Guide - only the left LED indicates a 100 Mb/s (Fast Ethernet) link only. On a complete and healthy cable, a Gigabit Ethernet (1000 Mb/s) must be established.

Hard to say what is killing the DHCP process here ...

[dtd41]

Thanks. I did not expect a RTFM response on an unmanaged switch (my bad) thank for the kind and forgiving reply. Given that info the DHCP issue is probably due to network topology. Thank you again

[schumaku]

Had not come to a conclusion ref. the DHCP issue, so left it open.

There is no problem with a topology like

Router<-GbE->G105<-FastEthernet(?)->G108<->Computer

Should work like a charm, permitting the cable isn't to bad.