Vik, There could be any number of reasons that DHCP isn't working. The client may not be requesting DHCP, the switch may not have portfast enabled, a router not having an IP helper address, DHCP server offline, DHCP server without a scope for the VLAN, and so on.
Perform a packet trace from the DHCP client and if necessary on the DHCP server (using SPAN). You will be able to determine the problem by identifying which packets are present in the capture and which are not. For example, you may find that the client sends a DHCP discovery packet but does not receive an offer packet from the DHCP server. If you see the same behavior on the server port (discovery, no offer) then it's possible that: - The DHCP server isn't operational or the service/daemon isn't running - The DHCP server doesn't have a scope defined for that VLAN - The DHCP server has run out of IP addresses for that VLAN On the other hand, if you the capture shows a discovery packet is sent by the client but the packet is never seen by the DHCP server it's much more likely that you have a missing (or incorrect) IP helper address. Once you perform the packet capture(s) you will probably need no further help. If you do, the information obtained from the capture would be enough for the group to point you in the right direction. - Tom Vik Vikky wrote: > Hi *, > > am fairly new to cisco products/ commands. > > have a problem > got a WS-X6348-RJ-45 module at slot 3 of 6509. In which am unable to get > DHCP broadcast /address from the main dhcp server. > configured all the ports to respective vlan-x and at the routing module in a > core switch (6509 with msfc) I hv given the ip helperaddress for this vlan. > rest of the catalyst 4006 switch fetches dhcp frm this scope. > > Below is the module capabilities: > > Type 10/100BaseTX > Speed auto,10,100 > Duplex half,full > Trunk encap type 802.1Q,ISL > Trunk mode on,off,desirable,auto,nonegotiate > Channel yes > Broadcast suppression percentage(0-100) > Flow control receive-(off,on),send-(off) > Security yes > Dot1x yes > Membership static,dynamic > Fast start yes > QOS scheduling rx-(1q4t),tx-(2q2t) > CoS rewrite yes > ToS rewrite DSCP > UDLD yes > Inline power no > AuxiliaryVlan 1..1000,1025..4094,untagged,dot1p,none > SPAN source,destination > COPS port group 3/1-48 > Link debounce timer yes > > > Module configuration: > > set vlan 68 3/1-48 > set port auxiliaryvlan 3/1-48 none > set port qos 3/1-48 trust-ext untrusted > set port qos 3/1-48 cos-ext 0 > set port enable 3/1-48 > set port speed 3/1-48 auto > set port trap 3/1-48 enable > set port name 3/1-48 > set port dot1x 3/1-48 port-control force-autho > set port dot1x 3/1-48 multiple-host disable > set port dot1x 3/1-48 re-authentication disabl > set port security 3/1-48 disable age 0 maximum > set port broadcast 3/1-48 100.00% > set port membership 3/1-48 static > set port protocol 3/1-48 ip on > set port protocol 3/1-48 ipx auto > set port protocol 3/1-48 group auto > set port flowcontrol 3/1-48 send off > set port flowcontrol 3/1-48 receive off > set cdp enable 3/1-48 > set udld disable 3/1-48 > set udld aggressive-mode disable 3/1-48 > > Cat-OS version: > > cat6000-sup.6-3-9.bin > > > > Can you guide me, anything I am missing out. > > Thank you > > _________________________________________________________________ > Get 10mb of inbox space with MSN Hotmail Extra Storage > http://join.msn.com/?pgmarket=en-sg Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=70926&t=70898 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
