03-26-2009 04:58 AM - edited 03-04-2019 04:06 AM
Am implementing a WLCM Based Wireless LAN to run in parallel with the existing Wired LAN.
I Require 2 VLANs, one each for WIRED and WLAN
Have Sub-interfaced the Router Ethernet Interface into two. However, doing this (Sub interfacing) results in the LAN being very SLOW (Having HIGH LATENCY).
What can be the problem?
How can i go about solving this problem?
Below is an extract from the Router configuration,(AFFECTED ROUTERS 2811 and 3725):
ip dhcp excluded-address 192.168.117.239 192.168.117.254
!
ip dhcp pool LWAP-POOL
network 192.168.117.128 255.255.255.128
default-router 192.168.117.254
option 60 ascii "Cisco AP c1250"
option 43 hex f104.c0a8.7501
!
ip dhcp pool WLAN-Clients
network 10.10.119.0 255.255.255.0
default-router 10.10.119.1
dns-server 192.168.119.10 172.16.1.52
interface FastEthernet0/0
no ip address
ip access-group 112 in
duplex auto
speed auto
!
interface FastEthernet0/0.117
description LWAP subint
encapsulation dot1Q 117
ip address 192.168.117.254 255.255.255.128
shutdown
!
interface FastEthernet0/0.119
description CONNECTION TO THIKA_ARCADE LAN Subint
encapsulation dot1Q 119
ip address 192.168.119.1 255.255.255.0
ip helper-address 192.168.119.10
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
interface Integrated-Service-Engine1/0
ip address 192.168.117.126 255.255.255.128
no keepalive
!
interface Integrated-Service-Engine1/0.4
description Interface to WLAN Clients
encapsulation dot1Q 4
ip address 10.10.119.1 255.255.255.0
Your Assistance will be highly appreciated!
04-07-2009 08:42 AM
Hey there, any one who can advice? Am still encountering this problem.
Walter
04-07-2009 10:59 AM
Nothing looks apparently wrong with your config, but knowing little of your topology is a bit of a hindrance.
What kind of switch does the router connect to? (L2 or L3)
What kind of APs are you using?
What kind of controller are you using?
What type of latency are you seeing? If you do a traceroute, are you seeing loops somewhere?
HTH,
John
04-07-2009 03:49 PM
Hi John,
AP's are LAP-1250. Controller is probably them NM-WLC modules.
04-07-2009 09:21 PM
But even before inserting the NM Card, just sub-interfacing the router interface, increases the latency to the remote site to 2000ms and above.
04-07-2009 03:49 PM
Walter,
interface Integrated-Service-Engine1/0
ip address 192.168.117.126 255.255.255.128 < ---- Is this correct?
04-07-2009 09:59 PM
Hi,
May be this will help, as at the Router end the Speed and duplex is auto / auto.
Can you also check the Speed and Duplex setting on the Switch side as well
Can you try Hardcoding at Switch and Router interfaces to Speed 100 duplex full.
once and check the performance.
sh int Fast 0/X
and sh int Gig 1/0/X
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