Config would be nice but if these devices are requesting DHCP on interface transition up it sounds a lot like STP blocking.
Do show us the interface configs -- but before that, check to see if portfast is on on the client port. --msa Verstuurd vanaf mijn iPhone > On Oct 22, 2017, at 4:55 PM, Igor Sukhomlinov <[email protected]> wrote: > > Can you show the 2960 config? > Is there anything anything in the logs? > > > On Mon, Oct 23, 2017 at 10:34 AM, Curtis Piehler <[email protected]> > wrote: > >> Including NSP >> >>> On Oct 22, 2017 7:33 PM, "Curtis Piehler" <[email protected]> wrote: >>> >>> No security features running and no DHCP snooping. There are 3 Raritan >>> PDUs and one Fortigate connected to the 2960G. All of them exhibiting the >>> same behavior. No dhcp requests passing through and no MAC address on the >>> port. Moving the host devices to the 3560G was my next step. I am not at >>> the location so just trying to do as much as I can remotely before the on >>> site visit. >>> >>> On Oct 22, 2017 7:22 PM, "Igor Sukhomlinov" <[email protected]> >>> wrote: >>> >>>> HI Curtis, >>>> >>>> Anything in the logs of the 2960? >>>> Do you have any security features enabled,e.g. DAI, DHCP snooping? Faced >>>> similar behavior several times due to configurations in the past. >>>> Is that only that Raritan experiencing problems on the 2960? Have you >>>> tried mowing the affected unit to the 3560? >>>> >>>> Rgds, >>>> Igor >>>> >>>> On Mon, Oct 23, 2017 at 9:24 AM, Curtis Piehler <[email protected]> >>>> wrote: >>>> >>>>> 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 >>>>> _______________________________________________ >>>>> cisco-nsp mailing list [email protected] >>>>> https://puck.nether.net/mailman/listinfo/cisco-nsp >>>>> archive at http://puck.nether.net/pipermail/cisco-nsp/ >>>>> >>>> >>>> > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
