[c-nsp] Cisco 2960G not passing DHCP
Curtis Piehler
cpiehler2 at gmail.com
Sun Oct 22 18:24:20 EDT 2017
I'm racking my brains out on this yet it seems so simple unless I am
encountering a bug.
I have several host devices connected to the following switch,
Firewalls/PDUs, etc...:
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 48 WS-C2960G-48TC-L 12.2(55)SE10 C2960-LANBASEK9-M
This switch sits down stream from a 3560G which uplinks to a firewall
(Router on a stick). The problem I am encountering is that the devices
connected downstream of the 2960G are not receiving DHCP from the 3560G
switch or firewall. Of course I have one DHCP at a time but to test
different devices that can serve out DHCP. What's odd is that I have the
same exact model PDU connected to the 3560G and it obtains DHCP without
issues.
The devices downstream of the 2960G do not yield any MAC address. I have
done all sorts of DHCP debugging and nothing comes up from the devices. I
even tried moving the DHCP server down to the 2960G and I see no activity.
Statically assigning IPs to devices work no problem.
The PDUs are Raritan factory defaulted so when the port is shut/no shut
they are designed to get DHCP. The firewall is a Fortinet with the
interface set to obtain DHCP.
Unfortunately I can not get a traffic sniffer on this switch but I'm
wondering if anyone has had this issue before or heard of this.
Curtis
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