From: Todd Veillette (tveillette@myeastern.com)
Date: Sun Nov 03 2002 - 20:15:35 GMT-3
Jeff,
Just to add to Chuck's reply, I noticed the gateway of the
failed forwarded dhcp's are via 25.252, which must be
a loopback on the Router; but I don't believe you would
see these if HSRP was set up correctly for vlan 5 as the
.254 would route via the helper.
-TV
----- Original Message -----
From: "Chuck Church" <cchurch@MAGNACOM.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, November 03, 2002 9:56 AM
Subject: Re: DHCP error
> Jeff,
> You've got HSRP configured with what looks like alternating
> priorities. Do you have ip helper on the other routing device?
> Technically, it should work on just one, and with both you'll get 2
> forwarded bootp requests, but you'd need that if you lost the primary MSFC
> with the helper statements. That's the only difference I see between VLAN
4
> and 5.
>
> Chuck Church
> CCIE #8776, MCNE, MCSE
> Sr. Network Engineer
> Magnacom Technologies
> 140 N. Rt. 303
> Valley Cottage, NY 10989
> 845-267-4000
>
>
> HI Jeff,
>
> I've just scanned down the post and the debug messages do seem strange,
>
> Can you confirm that:
> 1. the Winnt server has a scope defined corectly for vlan 5
> 2. that the switch has "ip classless" and "ip subnet-zero" switched on
> 3. If that still does not work try setting the helper address on vlan 5 to
> the broadcast address on vlan 2, ie 10.2.2.255
>
> good luck
>
> Adam
>
> -----Original Message-----
> From: nobody@groupstudy.com <mailto:nobody@groupstudy.com>
> [mailto:nobody@groupstudy.com]On Behalf Of
> jeff szeto
> Sent: 03 November 2002 13:39
> To: ccielab@groupstudy.com <mailto:ccielab@groupstudy.com>
> Cc: Prashanth; Larry Letterman; michael liu; Phil Virnoche
> Subject: Re: dhcp error
>
>
> Hi Group,
>
> The following is the related config. The dhcp server is a WinNT, located
in
> Vlan 2
> Vlan 4 dhcp clients can get ip while vlan 5 clients can't. They use the
same
> dhcp server.
> The switch can ping the dhcp server. Also, if I assign an address manually
> to
> a host in vlan 5, the connection is ok.
>
>
> interface Vlan2
> ip address 10.2.2.252 255.255.255.0
> no ip redirects
> no ip mroute-cache
> standby 2 preempt
> standby 2 ip 10.2.2.254
>
>
> interface Vlan4
> ip address 10.2.4.252 255.255.255.0
> ip helper-address 10.2.2.3
> ip helper-address 10.2.2.170
> no ip redirects
> no ip mroute-cache
> standby 4 preempt
> standby 4 ip 10.2.4.254
>
>
> interface Vlan5
> ip address 10.2.5.252 255.255.255.0
> ip helper-address 10.2.2.3
> ip helper-address 10.2.2.170
> no ip redirects
> no ip mroute-cache
> standby 5 priority 150 preempt
> standby 5 ip 10.2.5.254
>
> Thanks for your help!
>
> Jeff
>
> ----- Original Message -----
> From: michael liu
> To: prashanthcm@yahoo.com <mailto:prashanthcm@yahoo.com> ;
> jytszeto@hotmail.com <mailto:jytszeto@hotmail.com> ;
ccielab@groupstudy.com
> <mailto:ccielab@groupstudy.com>
> Sent: Sunday, November 03, 2002 5:58 PM
> Subject: Re: dhcp error
>
>
> Jan 1 08:57:27.463 HKG: DHCPD: BOOTREQUEST not
> > forwarded. No route to helper
> can you ping from the router?
>
>
>
> >From: Prashanth
> >Reply-To: Prashanth
> >To: jeff szeto , ccielab@groupstudy.com <mailto:ccielab@groupstudy.com>
> >Subject: Re: dhcp error
> >Date: Sat, 2 Nov 2002 17:13:26 -0800 (PST)
> >
> >Jeff,
> >
> > > *Jan 1 08:57:27.463 HKG: DHCPD: setting giaddr to
> >10.2.25.252.
> >
> >this is how the network is identified by the DHCP
> >server and I am assuming you have pools defined for
> >every VLAN. Every pool again should have the default
> >router/gateway as the VLAN interface address.
> >all VLAN interfaces will have helper addresses
> >configured to point to the DHCP server.
> >
> >I have tried this test with a W2K server on VLAN 1
> >with PCs on other VLANS with a NM-ESW-16 (etherswitch
> >module) which has the Catalyst IOS code on the Router
> >IOS...and it works!
> >
> >probably a #sh run would help and also what is ur DHCP
> >server?
> >
> >thanks
> >prashanth
> >
> >
> >
> >--- jeff szeto wrote:
> > > Hi Group,
> > >
> > > I have a 6500 with different vlans. The dhcp client
> > > can't get ip address. When
> > > I do a debug in the switch, I see a error showing no
> > > route to the dhcp server.
> > > But this server is connected to the switch and I can
> > > ping it from the switch.
> > > The following is the log and the route table.
> > > Could you help to resolve this problem?
> > >
> > > Thank you.
> > >
> > > Jeff
> > >
> > > Router#debug ip dhcp server packet
> > >
> > > *Jan 1 08:57:27.463 HKG: DHCPD: setting giaddr to
> > > 10.2.25.252.
> > > *Jan 1 08:57:27.463 HKG: DHCPD: BOOTREQUEST from
> > > 0100.065b.37ae.b4 forwarded
> > > to
> > > 10.2.20.170.
> > > *Jan 1 08:57:27.463 HKG: DHCPD: BOOTREQUEST not
> > > forwarded. No route to helper
> > > a
> > > ddr 10.2.20.170
> > > *Jan 1 08:57:27.463 HKG: DHCPD: BOOTREQUEST from
> > > 0100.065b.37ae.b4 forwarded
> > > to
> > > 10.2.20.3.
> > > *Jan 1 08:57:27.463 HKG: DHCPD: BOOTREQUEST not
> > > forwarded. No route to helper
> > > a
> > > ddr 10.2.20.3
> > > *Jan 1 08:57:27.567 HKG: DHCPD: forwarding
> > > BOOTREPLY to client
> > > 0006.5b37.aeb4.
> > > *Jan 1 08:57:27.567 HKG: DHCPD: creating ARP entry
> > > (10.2.25.15,
> > > 0006.5b37.aeb4)
> > > .
> > > *Jan 1 08:57:27.567 HKG: DHCPD: unicasting
> > > BOOTREPLY to client 0006.5b37.aeb4
> > > (
> > > 10.2.25.15).
> > > *Jan 1 08:57:27.567 HKG: DHCPD: setting giaddr to
> > > 10.2.25.252.
> > > *Jan 1 08:57:27.567 HKG: DHCPD: BOOTREQUEST from
> > > 0100.065b.37ae.b4 forwarded
> > > to
> > > 10.2.20.170.
> > > *Jan 1 08:57:27.567 HKG: DHCPD: BOOTREQUEST not
> > > forwarded. No route to helper
> > > a
> > > ddr 10.2.20.170
> > > *Jan 1 08:57:27.571 HKG: DHCPD: BOOTREQUEST from
> > > 0100.065b.37ae.b4 forwarded
> > > to
> > > 10.2.20.3.
> > > *Jan 1 08:57:27.571 HKG: DHCPD: BOOTREQUEST not
> > > forwarded. No route to helper
> > > a
> > > ddr 10.2.20.3
> > > *Jan 1 08:57:27.675 HKG: DHCPD: forwarding
> > > BOOTREPLY to client
> > > 0006.5b37.aeb4.
> > > *Jan 1 08:57:27.679 HKG: DHCPD: creating ARP entry
> > > (10.2.25.15,
> > > 0006.5b37.aeb4)
> > > .
> > > *Jan 1 08:57:27.679 HKG: DHCPD: unicasting
> > > BOOTREPLY to client 0006.5b37.aeb4
> > > (
> > > 10.2.25.15).
> > >
> > > Router#sh ip ro
> > > C 10.2.19.0/24 is directly connected, Vlan19
> > > C 10.2.20.0/24 is directly connected, Vlan20
> > > C 10.2.21.0/24 is directly connected, Vlan21
> > > C 10.2.22.0/24 is directly connected, Vlan22
> > > C 10.2.23.0/24 is directly connected, Vlan23
> > > C 10.2.24.0/24 is directly connected, Vlan24
> > > C 10.2.25.0/24 is directly connected, Vlan25
> > > C 10.2.26.0/24 is directly connected, Vlan26
> > > C 10.2.27.0/24 is directly connected, Vlan27
> >
> >
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This archive was generated by hypermail 2.1.4 : Tue Dec 03 2002 - 07:22:52 GMT-3