One thing to watch out in VLAN config is that DHCP broadcasts are sent in the default VLAN, not the tagged VLAN. But I'm not sure how this applies to access ports. I remember however that I once expected DHCP requests to come in on the tagged VLAN on the router (which was DHCP server) but they did come in untagged and later discovered that the standard is defining this (odd) behaviour.
Also as they are broadcasts, the "ip helper" command can help you to get DHCP over layer 3. Most cisco switches do support it and it is actually useful to set it so DHCP broadcasts are being directed to the DHCP server immediately. On 03.04.2012, at 09:24, Tobias Brunner wrote: > Hi there, > > Maybe there are some Cisco specialists reading this List =) > > On a WS-C3750X it tooks about 1 minute after connecting a port to change the > status from LINK-3-UPDOWN "up" to LINEPROTO-5-UPDOWN "up" > > Mar 27 16:25:37 192.168.1.144 788: *Mar 8 00:30:48.032: %LINK-3-UPDOWN: > Interface GigabitEthernet1/0/1, changed state to up > Mar 27 16:26:38 192.168.1.144 790: *Mar 8 00:31:49.227: %LINEPROTO-5-UPDOWN: > > Line protocol on Interface GigabitEthernet1/0/1, changed state to up > > Mar 27 16:25:54 192.168.1.144 789: *Mar 8 00:31:05.086: %LINK-3-UPDOWN: > Interface GigabitEthernet2/0/1, changed state to up > Mar 27 16:26:56 192.168.1.144 791: *Mar 8 00:32:06.583: %LINEPROTO-5-UPDOWN: > Line protocol on Interface GigabitEthernet2/0/1, changed state to up > > > The ports are configured like that: > > interface GigabitEthernet1/0/1 > switchport access vlan 27 > switchport mode access > spanning-tree portfast > spanning-tree bpdufilter enable > channel-group 1 mode active > ! > interface GigabitEthernet2/0/1 > switchport access vlan 27 > switchport mode access > spanning-tree portfast > spanning-tree bpdufilter enable > channel-group 1 mode active > ! > interface Port-channel1 > switchport access vlan 27 > switchport mode access > end > > The server which is connected has nothing special configured... It should > boot > via DHCP/PXE (of course without Bonding) and then the installed Linux with > Bonding configured. > Does anyone have an idea why this takes so long? > > Thanks! > > Cheers, > Tobias > > -- > Nine Internet Solutions AG, Albisriederstr. 243a, CH-8047 Zuerich > Support +41 44 637 40 40 | Tel +41 44 637 40 00 | Direct +41 44 637 40 13 > Skype nine.ch_support > > > _______________________________________________ > swinog mailing list > [email protected] > http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog _______________________________________________ swinog mailing list [email protected] http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
