DHCP relay with wlc 2106

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Scott Fella Wed, 10/08/2008 - 19:28

How do you have your wlan setup.... seems like something isn't configured right. The subnet the wireless clients need to be put on will need a dynamic interface configured in which the dhcp server ip will be entered. On the wlan ssid, you map that ssid to the interface you create. This is the normal way of setting up wireless using WLC's. Post your show run-config so we can see how you are setting the wlc up.

Sure here goes

(Cisco Controller) >show running-config

802.11a cac voice tspec-inactivity-timeout ignore

802.11a cac voice stream-size 84000 max-streams 2

802.11b cac voice tspec-inactivity-timeout ignore

802.11b cac voice stream-size 84000 max-streams 2

advanced location expiry tags 1200

advanced location expiry client 150

advanced location expiry calibrating-client 30

advanced location expiry rogue-aps 1200

auth-list add mic 00:0b:85:88:6e:70

interface create vlan27 27

interface address ap-manager 192.168.30.40 255.255.255.0 192.168.30.1

interface address management 192.168.30.41 255.255.255.0 192.168.30.1

interface address virtual 1.1.1.1

interface address dynamic-interface vlan27 192.168.27.10 255.255.255.0 192.168.27.1

interface dhcp ap-manager primary 192.168.30.1

interface dhcp management primary 192.168.30.1

interface dhcp dynamic-interface vlan27 primary 192.168.30.1

interface vlan vlan27 27

interface port ap-manager 1

interface port management 1

interface port vlan27 1

wlan apgroup add test test

wlan apgroup interface-mapping add test 1 vlan27

wlan apgroup enable

logging buffered 1

mesh security eap

mgmtuser add cwadmin **** read-write

mobility group domain WiFi

msglog level critical

network multicast global enable

network broadcast enable

network mgmt-via-wireless enable

network rf-network-name WiFi

snmp version v2c enable

snmp version v3 enable

sysname SKNWifiControl

wlan create 1 WirelessHotspot WirelessHotspot

wlan security wpa disable 1

wlan enable 1

The wireless clients are on the same subnet as the wlc and the dhcp server.

Attached is a debug of the dhcp request and offer process.

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option len, including the magic cookie = 64

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: received DHCP DISCOVER msg

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 116, len 1

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 61, len 7

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: requested ip = 192.168.30.148

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 12, len 7

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: vendor class id = MSFT 5.0 (len 8)

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 55, len 11

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcpParseOptions: options end, len 64, actual 64

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 Forwarding DHCP packet (332 octets) from 00:0c:f1:42:d9:d1

-- packet received on direct-connect port requires forwarding to external DHCP server. Next-hop is 192.168.30.1

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option len, including the magic cookie = 61

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: received DHCP OFFER msg

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: netmask = 255.255.255.0

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 15, len 14

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: gateway = 192.168.30.41

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 46, len 1

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: DNS server, cnt = 2, first = 209.59.69.2

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: lease time (seconds) = 7200

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: server id = 192.168.30.1

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcpParseOptions: options end, len 61, actual 64

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option len, including the magic cookie = 74

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: received DHCP REQUEST msg

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 61, len 7

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: requested ip = 192.168.30.148

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: server id = 1.1.1.1

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 12, len 7

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 81, len 11

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: vendor class id = MSFT 5.0 (len 8)

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 55, len 11

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcpParseOptions: options end, len 74, actual 74

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 Forwarding DHCP packet (340 octets) from 00:0c:f1:42:d9:d1

-- packet received on direct-connect port requires forwarding to external DHCP server. Next-hop is 192.168.30.1

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option len, including the magic cookie = 61

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: received DHCP ACK msg

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: netmask = 255.255.255.0

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 15, len 14

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: gateway = 192.168.30.41

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 46, len 1

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: DNS server, cnt = 2, first = 209.59.69.2

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: lease time (seconds) = 7200

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcp option: server id = 192.168.30.1

Thu Oct 9 12:27:10 2008: 00:0c:f1:42:d9:d1 dhcpParseOptions: options end, len 61, actual 64

Thu Oct 9 12:27:13 2008: 00:0c:f1:42:d9:d1 dhcp option len, including the magic cookie = 64

Thu Oct 9 12:27:13 2008: 00:0c:f1:42:d9:d1 dhcp option: received DHCP INFORM msg

Thu Oct 9 12:27:13 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 61, len 7

Thu Oct 9 12:27:13 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 12, len 7

Thu Oct 9 12:27:13 2008: 00:0c:f1:42:d9:d1 dhcp option: vendor class id = MSFT 5.0 (len 8)

Thu Oct 9 12:27:13 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 55, len 13

Thu Oct 9 12:27:13 2008: 00:0c:f1:42:d9:d1 dhcpParseOptions: options end, len 64, actual 64

Thu Oct 9 12:27:13 2008: 00:0c:f1:42:d9:d1 Forwarding DHCP packet (332 octets) from 00:0c:f1:42:d9:d1

-- packet received on direct-connect port requires forwarding to external DHCP server. Next-hop is 192.168.30.1

Thu Oct 9 12:27:16 2008: 00:0c:f1:42:d9:d1 dhcp option len, including the magic cookie = 64

Thu Oct 9 12:27:16 2008: 00:0c:f1:42:d9:d1 dhcp option: received DHCP INFORM msg

Thu Oct 9 12:27:16 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 61, len 7

Thu Oct 9 12:27:16 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 12, len 7

Thu Oct 9 12:27:16 2008: 00:0c:f1:42:d9:d1 dhcp option: vendor class id = MSFT 5.0 (len 8)

Thu Oct 9 12:27:16 2008: 00:0c:f1:42:d9:d1 dhcp option: skipping option 55, len 13

Thu Oct 9 12:27:16 2008: 00:0c:f1:42:d9:d1 dhcpParseOptions: options end, len 64, actual 64

Thu Oct 9 12:27:16 2008: 00:0c:f1:42:d9:d1 Forwarding DHCP packet (332 octets) from 00:0c:f1:42:d9:d1

-- packet received on direct-connect port requires forwarding to external DHCP server. Next-hop is 192.168.30.1

Scott Fella Thu, 10/09/2008 - 09:08

Attach he show run-config you ran a show running-config. Attach the text file makes it easier to read.

sanamon Mon, 10/13/2008 - 00:24

It looks like 192.168.30.1 is the default gateway of your management network, however you say you have a windows DHCP server. Yet the DHCP server for the VLAN27 etc interfaces are set to 192.168.30.1.

Is 192.168.30.1 really the IP addr of the DHCP server?

Regards,

Jonas

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