01-23-2012 07:38 AM - edited 03-07-2019 04:30 AM
Hello all,
I'm fairly new to Cisco configuration and I am looking at a problem for a client that involves the use of a Cisco 887 (wired only) as the main router/gateway.
The problem I am investigating involves the allocatoni of DHCP addresses from the device to a product we have designed that connects to the router.
I am attempting to set the 880 up on the bench with no ADSL connection and just use the DHCP feature of the box for the 4 switch ports on the back.
I have tried all kinds of configurations from default. Whatever I do I can't get the router to assign an IP address to anything that is plugged in (Windows or Linux machines). What could I be doing wrong ? It can't be that difficult to get the system to just act as a DHCP server.
Configurations I have tried that don't work are:
Configure DHCP
To configure your router for DHCP operation, perform these steps, beginning in global configuration mode:
1. ip domain name name
2. ip name-server server-address1 [server-address2...server-address6]
3. ip dhcp excluded-address low-address [high-address]
4. ip dhcp pool name
5. network network-number [mask | prefix-length]
6. import all
7. default-router address [address2...address8]
8. dns-server address [address2...address8]
9. domain-name domain
10. exit
(That didnt work)
Then tried to add a VLAN and bound it to the port being used :
Assign a Switch Port to a VLAN
To assign a switch port to a VLAN, perform these steps, beginning in global configuration mode:
1. interface switch port id
2. switchport access vlan vlan-id
3. end
Even checked all the logs and its as if there have been no requests:
Router#show ip dhcp pool
Pool dpool1 :
Utilization mark (high/low) : 100 / 0
Subnet size (first/next) : 0 / 0
Total addresses : 254
Leased addresses : 0
Pending event : none
1 subnet is currently in the pool :
Current index IP address range Leased addresses
192.168.10.1 192.168.10.1 - 192.168.10.254 0
Router#show ip dhcp server statistics
Memory usage 23179
Address pools 1
Database agents 0
Automatic bindings 0
Manual bindings 0
Expired bindings 0
Malformed messages 0
Secure arp entries 0
Message Received
BOOTREQUEST 0
DHCPDISCOVER 0
DHCPREQUEST 0
DHCPDECLINE 0
DHCPRELEASE 0
DHCPINFORM 0
Message Sent
BOOTREPLY 0
DHCPOFFER 0
DHCPACK 0
DHCPNAK 0
Router#
Router#show vlan-switch
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0, Fa1, Fa2
2 VLAN0002 active Fa3
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 1002 1003
2 enet 100002 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 1 1003
1003 tr 101003 1500 1005 0 - - srb 1 1002
1004 fdnet 101004 1500 - - 1 ibm - 0 0
1005 trnet 101005 1500 - - 1 ibm - 0 0
Is there any way I can get this router to work standalone as a DHCP server and switch with no connection to ADSL ?
I'm pulling my hair out here.
Thanks in advance
Marc
01-24-2012 03:10 AM
For anyone that might be wondering the answer is to add the dhcp service to the vlan...
interface Vlan1
ip address pool dpool1
!
Simple really. There is no need for the secondary Vlan, so simple step is to setup the dhcp service then add the service to the default vlan (1) and all will work.
Thanks to the community for all the support and suggestions (not)
12-18-2012 11:51 AM
Hey Marc!
I had just the same problem a moment ago and I found your answer!!! So thank you very much, I know this community didn't pull through for you but you have for me so I am very much obliged
Cathal.
02-06-2017 07:52 PM
Hi Guys,
Just posting a quick note. I recently had a similar issue.
Ensure that the clock is set on the 887 router with the correct date / time.
The router that I encountered had the year set to 20 years ahead. So, it was refusing to handout IP's to clients.
After setting the time the issue was resolved.
Regards
11-28-2019 05:38 AM
SIR! your help is very much appreciated, i been running around circles all day.
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