Configure IP helper address on ACE

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I want to configure 'ip helper-address' on the Server side vlan on ACE Context to forward UDP broadcasts. The L3 interface for the servers are on ACE and the servers want to communicate to the NIS servers by resolving ypbind.

I tried the command 'ip dhcp relay server <IP address> on the Vlan interface on ACE context, but it is not working. Any ideas to resolve this is much appreciated.

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Gilles Dufour Wed, 05/20/2009 - 00:04

Try the following in the same order as me:

switch/Admin(config)# ip dhcp relay server 192.168.30.44

switch/Admin(config)# ip dhcp relay enable

switch/Admin(config)# do sho ip dhcp relay conf

Context level configuration:

Status: Enabled

Server#1: 192.168.30.44

Interface level configuration:

switch/Admin(config)# do sho ip dhcp relay statistics

Context level configuration:

Number of BOOTREQUEST packet relayed: 0

Number of DHCPDISCOVER packet relayed: 0

Number of DHCPREQUEST packet relayed: 0

Number of DHCPDECLINE packet relayed: 0

Number of DHCPRELEASE packet relayed: 0

Number of DHCPINFORM packet relayed: 0

Number of BOOTREPLY packet relayed: 0

Number of DHCPOFFER packet relayed: 0

Number of DHCPACK packet relayed: 0

Number of DHCPNAK packet relayed: 0

Number of failures while relaying: 0

Interface level Statistics:

switch/Admin(config)#

Gilles

Gilles Dufour Wed, 05/20/2009 - 06:55

do you have a class-map with catching 0.0.0.0/0 ?

Did you get the 'show ip dhcp' info ?

Does it show any intercepted traffic ?

Gilles.

There is a class-map for 0.0.0.0/0.

ACE/C1# sh ip dhcp relay information policy

DHCP Relay reforwarding policy configured = REPLACE

ACE/C1# sh ip dhcp relay statistics

Interface level configuration:

Vlan - vlan311:

Interface id - 6:

Number of BOOTREQUEST packet relayed: 0

Number of DHCPDISCOVER packet relayed: 0

Number of DHCPREQUEST packet relayed: 0

Number of DHCPDECLINE packet relayed: 0

Number of DHCPRELEASE packet relayed: 0

Number of DHCPINFORM packet relayed: 0

Number of BOOTREPLY packet relayed: 0

Number of DHCPOFFER packet relayed: 0

Number of DHCPACK packet relayed: 0

Number of DHCPNAK packet relayed: 0

Number of failures while relaying: 0

sachinga.hcl Thu, 05/21/2009 - 05:21

Hi Peter ,

have you applied it to particular vlan or not , I am not sure by looking at your config.

to enable the DHCP relay at the VLAN interface level, enter:

host1/Admin(config)# interface vlan 50

Kindly check if it can make your config work.

See below mentioned url for complete dhcp relay config :

http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/ace_appliances/vA1_7_/configuration/routing_bridging/guide/dhcp.html

Kindly see the following url for my other postings:

http://boardreader.com/fp/Cisco_Systems_Networking_Profe_309110/Application_Networking_543840.html#hot_threads

Kind regards.

Sachinga.hcl

Gilles Dufour Thu, 05/21/2009 - 07:24

the dhcp request will actually match the 0.0.0.0/0 class-map and it will be dropped.

Do you have the possibility to disable that class-map/policy-map and see if that solves the problem.

I think there is a bug open for this currently.

Gilles.

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