10-01-2013 08:27 PM - edited 07-04-2021 12:59 AM
Hi Guys,
This is my first post topic.
We have a strange problem with wireless network dropping out on printers.
Our network has couples of AIR-CAP3502I (around 60 of them) and WLC4404 . Most of those AIR CAP are located at our retail stores and running in HREAP mode. SSID is configured as local switching / central authen with WPA2 / AES.
It works perfectly fine on laptop / and other mobile device but just not printers. We tried Brother and HP wireless printer and they're both having same issue.
Every now and then, printer disconnected from wireless network. It is shown as associated on controller, but we can't ping it at all from local network to the printer
The funny thing is, when this happened, we could ping the printer from Head office. (I forgot to mention, we have MPLS network between stores and HO, router is also Cisco gear).
Only way to fix this is reboot the printer.
Has anyone bump into this situation before?
Many thank,
Tandy
10-02-2013 05:07 AM
Post your show WLAN
Sent from Cisco Technical Support iPhone App
10-02-2013 05:57 PM
Hi,
Below is config detail.
WLAN Identifier.................................. 3
Profile Name..................................... MyCompany
Network Name (SSID).............................. MyCompany
Status........................................... Enabled
MAC Filtering.................................... Disabled
Broadcast SSID................................... Enabled
AAA Policy Override.............................. Disabled
Network Admission Control
Radius-NAC State............................... Disabled
SNMP-NAC State................................. Disabled
Quarantine VLAN................................ 0
Maximum number of Associated Clients............. 0
Number of Active Clients......................... 25
Exclusionlist.................................... Disabled
Session Timeout.................................. Infinity
CHD per WLAN..................................... Enabled
Webauth DHCP exclusion........................... Disabled
Interface........................................ int-wifi
Multicast Interface.............................. Not Configured
--More-- or (q)uit
WLAN ACL......................................... unconfigured
DHCP Server...................................... Default
DHCP Address Assignment Required................. Disabled
Static IP client tunneling....................... Disabled
Quality of Service............................... Silver (best effort)
Scan Defer Priority.............................. 4,5,6
Scan Defer Time.................................. 100 milliseconds
WMM.............................................. Allowed
WMM UAPSD Compliant Client Support............... Disabled
Media Stream Multicast-direct.................... Disabled
CCX - AironetIe Support.......................... Disabled
CCX - Gratuitous ProbeResponse (GPR)............. Disabled
CCX - Diagnostics Channel Capability............. Disabled
Dot11-Phone Mode (7920).......................... Disabled
Wired Protocol................................... None
IPv6 Support..................................... Disabled
Peer-to-Peer Blocking Action..................... Disabled
Radio Policy..................................... All
DTIM period for 802.11a radio.................... 6
DTIM period for 802.11b radio.................... 6
Radius Servers
Authentication................................ Global Servers
Accounting.................................... Global Servers
--More-- or (q)uit
Dynamic Interface............................. Disabled
Local EAP Authentication......................... Disabled
Security
802.11 Authentication:........................ Open System
Static WEP Keys............................... Disabled
802.1X........................................ Disabled
Wi-Fi Protected Access (WPA/WPA2)............. Enabled
WPA (SSN IE)............................... Disabled
WPA2 (RSN IE).............................. Enabled
TKIP Cipher............................. Disabled
AES Cipher.............................. Enabled
Auth Key Management
802.1x.................................. Disabled
PSK..................................... Enabled
CCKM.................................... Disabled
FT(802.11r)............................. Disabled
FT-PSK(802.11r)......................... Disabled
FT Reassociation Timeout......................... 20
FT Over-The-Air mode............................. Enabled
FT Over-The-Ds mode.............................. Enabled
CCKM tsf Tolerance............................... 1000
CKIP ......................................... Disabled
--More-- or (q)uit
IP Security................................... Disabled
IP Security Passthru.......................... Disabled
Web Based Authentication...................... Disabled
Web-Passthrough............................... Disabled
Conditional Web Redirect...................... Disabled
Splash-Page Web Redirect...................... Disabled
Auto Anchor................................... Disabled
H-REAP Local Switching........................ Enabled
H-REAP Local Authentication................... Disabled
H-REAP Learn IP Address....................... Disabled
Client MFP.................................... Disabled
Tkip MIC Countermeasure Hold-down Timer....... 60
Call Snooping.................................... Disabled
Roamed Call Re-Anchor Policy..................... Disabled
SIP CAC Fail Send-486-Busy Policy................ Enabled
SIP CAC Fail Send Dis-Association Policy......... Disabled
Band Select...................................... Disabled
Load Balancing................................... Disabled
Mobility Anchor List
WLAN ID IP Address Status
------- --------------- ------
10-02-2013 06:03 PM
I would set the DTIM to 2 and also enable H-REAP Learn IP Address.
Sent from Cisco Technical Support iPhone App
10-02-2013 06:04 PM
It is shown as associated on controller, but we can't ping it at all from local network to the printer
when this happened, we could ping the printer from Head office.
Sounds like either the ARP is going awry.
What happens when this happens and you run a traceroute from the local network?
10-03-2013 09:22 PM
Hi guys,
Thanks for quick reply,
Below is traceroute from local network
Tracing route to 10.2.46.250 over a maximum of 30 hops
1 printer.mynet.int [10.2.46.10] reports: Destination host unreachable.
show arp on the local router
Internet 10.2.46.250 0 0080.92a9.cb51 ARPA BVI1
The mac-address is correct.
Ping from local host computer
Pinging 10.2.46.250 with 32 bytes of data:
Reply from 10.2.46.10: Destination host unreachable.
Reply from 10.2.46.10: Destination host unreachable.
Ping from Head Office network
Pinging 10.2.46.250 with 32 bytes of data:
Reply from 10.2.46.250: bytes=32 time=43ms TTL=251
Reply from 10.2.46.250: bytes=32 time=44ms TTL=251
Controller show AP is in associated and I can ping the HREAP AP
I've tried suggestion from Scott to change DTIM and Learn client IP Address but it doesn't seem to fix the problem.
Many thanks
10-07-2013 11:33 PM
Have you tested the printers before deploying in production? It could be an printer driver firmware/ setting issue causing this.
Raja
10-08-2013 12:45 AM
Hi,
Both HP and Brother are tested at HO network and works fine for few weeks prior sent to remote site.
I don't think it related to driver because it happened at network layer. All firmware on printers are latest version.
In previous post, when issue occur, I'm still able to ping printer from head office but not local. This makes me think issue sits within hreap ap.
Is there a way I could enable debug to see what happening on ap based on printer MAC address?
Many thanks,
Tandy.
Sent from Cisco Technical Support iPhone App
10-08-2013 09:20 PM
Hi all,
Leo post is pointed to the problem.
When issue occurs, all local computer does not have arp entry except router which explain why we could ping from head office but not locally.
If I add static arp entry, I can ping from local.
I capture traffic on one of computer and see arp broadcast is sent but nothing receive.
Could it be ap drop arp request somehow?
Sent from Cisco Technical Support iPhone App
10-08-2013 09:36 PM
Can you check your Subnet Mask and Default Gateway of your printers and make sure they match with the router?
What is the model of your router?
10-09-2013 12:51 AM
Yes, they are correct.
Sent from Cisco Technical Support iPhone App
10-09-2013 01:50 AM
Router is C1801.
Sent from Cisco Technical Support iPhone App
10-09-2013 03:15 PM
Yes, it may be the issue of ARP where the IP is not getting mapped to the MAC address. Try to do the static binding of the MAC address of the printer.
10-10-2013 02:32 AM
Static arp entries will work but I think this is alternative option.
Still have to find out why ap not forwarding arp request.
Anyone got suggestion?
Sent from Cisco Technical Support iPhone App
10-13-2013 05:57 PM
Hi Guys,
Just another found:
Client on wired network send arp req broadcast. This request reaches router interface and all other wired devices
except wireless client.
debug arp on AP itself and never received any rcvd response.
Can anyone please help? This problem is insane.
Many thanks.
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