DHCP server created on switch can't bind IP address

klui — Sun, 04 Aug 2019 03:50:37 GMT

Hi,

I have an ICX6610 that I wanted to test some subnets on an SRX 240 firewall. On my SRX I have an interface that's configured as a DHCP client. If I connect a cord between that port and another switch that has DHCP from an SSG firewall, I get an IP bound.

But if I connect it to a port on the 6610 I get the offer but there is no binding on the SRX. The 6610 though sees it as bound. After around a minute or so the SRX port returns to INIT state.

How can I investigate DHCP issues on the 6610?

Here's my config:

vlan 20 by port
 untagged ethe 1/1/2
 router-interface ve 20
!

ip dhcp-server enable
!
ip dhcp-server pool dhcp20
 dhcp-default-router 192.168.20.254
 excluded-address 192.168.20.100 192.168.20.254
 lease 1 0 0
 network 192.168.20.0 255.255.255.0
 deploy
!

interface ve 20
 ip address 192.168.20.254 255.255.255.0
!

SSH@ICX6610-48P Router#show ip dhcp-server binding
Bindings from all pools:
        IP Address    Client-ID/        Lease expiration Type
                      Hardware address

      192.168.20.1    288a.1c40.e8cd   000d:23h:59m:37s   Automatic

I have no VLANs configured on the SSG/SRX port. I thought I could define a VLAN and untag the port on the ICX and it should work. The port works with a notebook running Windows. Is there anything more I must add to the configuration?

Thanks!

Re: DHCP server created on switch can't bind IP address

hashim_bharooc1 — Wed, 07 Aug 2019 00:00:21 GMT

Hey K Lui,
It seems to be working as you already served an IP Address.

Your config is good, your Pool is for vlan 20 ONLY, but it ONLY has one port, all devices connecting to VLAN 20 will get DHCP served.
Please add more ports to VLAN 20.

Hope this helps.

Thanks
Hashim

topic Re: DHCP server created on switch can't bind IP address in ICX Switches

DHCP server created on switch can't bind IP address

Re: DHCP server created on switch can't bind IP address