Hello everybody!
I've on my hands 2 greats wireless routers cisco, the 881c (left) and the 881w (right).
This routers are a embedded solution, this mean:
A CISCO 881 series contain:
- Router
- AP
- VPN
- Firewall
- Switching (VLANs on this case)
I started to configure the Router and the AP for both CISCOs, so the point to following is this way...
Well, I'm stuck with a special configuration of one of this both routers (the 881c). Both are very similar, both has the same technical specifications, so finally proceeded to configure the 881w with the following configs:
- The F/4 port will be the WAN side, where I conect my ISP internet
- 3 DHCP pools for each VLAN
- 3 VLANs replicated to the FastEthernet ports (VLAN 10 for F/0, VLAN 20 for F/1 and VLAN 30 for F/2-F/3)
- The same 3 VLAN need to be present on the AP side, were there is 3 SSID's (wifiduoc, duoc and Gerencia)
- Each SSID are asigned to each VLAN 10, 20 and 30
- And finally, each DHCP pool should asign the same IPs of the VLANs range dynamically through DHCP.
The result: The Cisco 881w works perfectly! All computers conected to the router 881w obtain the corresponding IP on the VLAN via cable, heach PC connected the corresponding port, or via wifi on the corresponding SSID.
The 881c do correctly the following:
- The WAN port detect correctly the ISP IP
- The 3 SSIDs are irradiated and are detected by the laptops and computers equiped with wireless NIC
- The FE ports are asigned correctly to the VLANs
The 881c can't do correctly the following:
- The DHCP ip assignment via cable can't be asigned on the computers
- The DHCP ip assignment via SSID (wifi) can't be asigned on the computers or laptops too
- If I configure the computers with a static IP, the 881c work well and it traffic to internet well
I've searched and I've investigated, so I've put the following command to verify if the DHCP brings me the ip bindings:
router-881c#show ip dhcp binding Bindings from all pools not associated with VRF: IP address Hardware address Lease expiration Type 192.168.10.23 01e0.cb4e.42f1.9d Jan 01 1900 02:24 AM Automatic
My computer has been correctly identified with the MAC by the router 881c, BUT:
If you look, the IPv4 not are assigned on my PC from the 881c router, this IP correspond to APIPA protocol of Windows.
For other hand, the SSID's are irradiated correctly from the Dot11Radio 0 antena... but with the same problem, the DHCP ip assignment doesn't work.
router-881c#show ip dhcp binding Bindings from all pools not associated with VRF: IP address Hardware address Lease expiration Type 182.168.30.11 0100.1b11.b1c5.53 Jan 01 1900 02:51 AM Automatic 192.168.10.28 01e0.cb4e.42f1.9d Jan 01 1900 02:51 AM Automatic
If I try the same configuration on the 881w all work very fine. Take a look:
router-881w#show ip dhcp binding Bindings from all pools not associated with VRF: IP address Hardware address Lease expiration Type 182.168.30.11 0100.1b11.b1c5.53 Nov 03 2013 09:40 PM Automatic 192.168.10.11 01e0.cb4e.42f1.9d Nov 03 2013 09:35 PM Automatic
For now, I can't found a solution for this weird issue, I think that the router 881c has a bug, so I've probed two different OS's, take a look:
router-881c#dir
Directory of flash:/
1 -rw- 31291784 Feb 29 1984 00:01:00 +00:00 c800-universalk9-mz.SPA.151-4.M4.bin
2 -rw- 3472 Feb 6 2036 06:35:36 +00:00 cpconfig-8xxW.cfg
3 -rw- 3000320 Feb 6 2036 06:36:00 +00:00 cpexpress.tar
4 -rw- 1038 Feb 6 2036 06:36:14 +00:00 home.shtml
5 -rw- 122880 Feb 6 2036 06:36:26 +00:00 home.tar
6 -rw- 1697952 Feb 6 2036 06:38:14 +00:00 securedesktop-ios-3.1.1.45-k9.pkg
7 -rw- 415956 Feb 6 2036 06:38:30 +00:00 sslclient-win-1.1.4.176.pkg
8 -rw- 3472 Feb 6 2036 06:30:02 +00:00 startup.backup.20360206-063002-UTC
9 -rw- 780 Feb 6 2036 07:31:32 +00:00 vlan.dat
10 -rw- 52841320 Feb 6 2036 11:30:28 +00:00 c800-universalk9-mz.SPA.153-1.T.bin
The 151-4.M4 are the original OS.
With both OS's occur the same problem, The DHCP does not assign the IP'S.
There is other weird symptom: If I assign a static IP to my computer, the traffic to the LAN and Internet work great on the 881c (via wifi and via cable).
So the only problem is about the DHCP IP assignment from the 881c.
If anybody can helpme will be great!
I've tried everything, but nothing work, :'-(
PS: I've attached the [show configs] and [show versions] from the 881w and the 881c
Chers,
Alfred.
Well,
Finally I want to share the REAL solution of this terrible problem.
All this problem began past year 2013, around November.
The solution was found in 5 December of 2013, too late to share today in June of 2014, hahaha.
But I think that always is convenient to show this type of information to the CISCO community.
Wherein we could see that the DHCP Ack message was sent from the server but never received by the client. I’ve found the correct reasoning for seeing the Expired address message and have taken the right approach towards fixing it, so congrats on that for me! hahaha.The clock issue is due to bug which is not currently fixed by CISCO and has been advised to replace those router where this problem is seen. Here is bug idCSCue79402. You can read more about this here: (you need High Level Permissions to view this bug) http://tools.cisco.com/squish/BBCb2CSCue79402 details: Symptoms: The router fails to save the last clock set ... command even after applied clock update-calendar command. Conditions: This symptom occurs when you powercycle the router. Workaround: Re-enter clock set ... and clock update-calendar commands, after the router is rebooted.At last, this problem has been fixed, now I've a new router actually working in production in the company from the past year.
See ya CISCO community !