WISM Troubleshooting - Cisco Troubleshooting ... 6500_VSS (config)# wism ... WISM Troubleshooting...

© 2006 Cisco Systems, Inc. All rights reserved. 1

WISM Troubleshooting

By Salil Prabhu

© 2006 Cisco Systems, Inc. All rights reserved. 2

WISM - Cisco Wireless Services ModuleLine Card in Cisco Catalyst 6500 Series Switch and Cisco 7600 Routers.

No External Gig ports.

Communicates with Sup720 over backplane.

Each WISM has 2 4404 WLC’s built in.

2 console ports per WISM.

150 AP per WLC . Total = 300 APs per WISM.

Max 5 WISM Blades per Chassis with no other service modules installed.

If service modules installed, MAX = 4 wism blades.

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Supported Modules & Code

• Requires Supervisor 720 • Requires Native IOS

12.2(18)SXF2 or higher IP Services feature set or higher

• Any Catalyst 6500 Series Chassis

• 7600 Router with 12.2(18)SXF5 or higher.

• Only supported on 7609 and 7613

• 6500 in VSS is supported.Min Code = 12.2(33)SXI

• No licenses.• Memory 512 MB and Flash 128 MB

WiSM supported in the following slots:

SLOT 6503-E 6504 6506 6509 6513

1-3 -4 - -

5-6 - - - - -7-8 - - - -9 - - -

10-13 - - - -

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Front Panel of WISM.

Status LED– Normal sequence: – Orange (booting), Green (operational)– Fault during initialization: – Orange (booting), Red (diagnostic)– Environmental Monitoring: – Orange (Over temp condition - minor)

Red (Over temp condition - critical)

Disk LED– Only lit when Compact Flash is not installed

Console Port ( 2 ports )– Serial command line interface

Compact Flash– Support Compact Flash and IBM MicroDrive

Power LED- Green . Operational.- Red (unsupported code on 6500/7600.)

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Wireless Controller Product Portfolio

# of APs10025

WiSM-300

12 50 3006

Per

form

ance

& S

cale

1

5508-12

250 500

5508-12, 25, 50, 100, 250,500 (LICENSE-BASED)

5508-25 5508-50 5508-100 5508-250

WLCME-6, 8, 12, 25

3750G-25, 50

4404-1004402-12, 25, 50

2106, 12, 25

H-REAP

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Controller Comparison5500 4400 WiSM

# of Access Points12, 25, 50, 100, 250

*500 on 7.0 code12, 25, 50, 100 300

Throughput Up to 8 Gbps Up to 4 Gbps Up to 8 Gbps

Clients Up to 7,000 Up to 5,000 Up to 10,000

Concurrent AP upgrades/joins Up to 100 Up to 10 Up to 20

Network I/O Up to 8, 1 Gbps SFPs

Up to 4, 1 Gbps SFPs Cat6k back plane

Mobility domain size Up to 36,000 APs Up to 7,200 APs Up to 10,800 APs# of controllers per physical device 1 1 2

Power Consumption 125W 47W 164WAP count and feature upgrade via licensing Yes No No

Encrypted data link between AP and controller Yes No No

OfficeExtend Solution Yes No No

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Getting Started -

Verify Module is installed in correct slot and passed diagnostic tests.

Show module.

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Verify if 6500/7600 has correct software version.

Show version

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Verify power available on Switch.

show power total show power available

show power status all

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Powering off the module.

Power enable module <slot number>

{ By default it is enabled }

Use “no power enable module <slot number>” to disable power.

Example: 6504_Switch(config)#power enable module ?

<1-4> module slot number

WISM Blades are hot-swappable.

i.e You do not need to power off the 6500. But before removing the blades,

power off the module.

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Configuring 6500. 2 Methods

Manual

Flexibility

Deprecated in SXI code.12.2.18SXF2-5Automatic/Macro commands.

Reduce configuration tasks and thus avoid errors.

Cannot manually change Gig ports configurations.

12.2.18SXF6 or higher. {supports both methods }SXH code {supports both methods }SXI code

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WCP protocol - Sup720 Functions.Sup720 communicates with the WISM over service port using WCP protocol.

Supervisor snoops on service port’s ARP request, learns its IP, starts sending hellos every 20 sec.

Hello timeout – 5 sec, after 3 retransmits, Controller sends trap thru the management, after 12 attempts, declares down.With help of state exchange it updates the Sup of (slot # , proc#, controller’s management IP, Service port IP address)Peer information, any controller on chassis knows about the rest.

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WCP – WLC Functions.

Controller requests Sup for its slot/proc info.

Controller conveys its management IP address and the software version to Sup (when changed on-the-fly, it is conveyed to Sup automatically).

After every 12 hellos (240 sec), controller requests global state info about other controllers in the system.

WCP runs on UDP/IP, port 10000 on service interface (not visible outside)

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Debugs on Sup720 for WCPRequest and Response protocol.

Sup720 sending Requests. i.e hello packet.

WLC sending a response.

Check seq numbers and SRC/DST IP.

debug wism wcp hdr Use when Service port is not coming up.

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Debugs on WLC for WCP.

WLC responding to keepalives.

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Example:

WISM installed in Module 4

Gig Ports gig4/1-4 = WLC1

Gig Ports gig4/5-8 = WLC2

Gig Port gig4/9 = Service Port for WLC1.

Gig Port gig4/10 = Service Port for WLC2.

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Step 1- Configuring Service Port.Create Service Port Vlan. Non-routable and in different supernet than management vlan of WLC.

Verify a layer 2 vlan is also created.Ex: config t , vlan 192

Setup DHCP scope for service port vlan.

Verify you have added wism service-vlan command.6504_Switch#show run | i wism

ip dhcp pool wism-service-port

wism service-vlan 192

ip dhcp pool wism-service-portnetwork 192.168.10.0 255.255.255.0default-router 192.168.10.1

!ip dhcp excluded-address 192.168.10.1 192.168.10.2!interface Vlan192ip address 192.168.10.1 255.255.255.0

end!wism service-vlan 192

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Step 2:Manual Config of Gig ports.

Create port channel.6504_Switch#config t6504_Switch(config)#int po106504_Switch(config-if)# switchport6504_Switch(config-if)# switchport trunk encapsulation dot1q6504_Switch(config-if)# switchport mode trunk6504_Switch(config-if-range)#switchport trunk allowed vlan 366,367,3686504_Switch(config-if-range)#switchport trunk native vlan 3666504_Switch(config-if)#no shut

Assign the port channel to Gig ports.6504_Switch(config)#int range gigabitEthernet 4/1-46504_Switch(config-if-range)#switchport6504_Switch(config-if-range)# switchport trunk encapsulation dot1q6504_Switch(config-if-range)# switchport mode trunk6504_Switch(config-if-range)#switchport trunk allowed vlan 366,367,3686504_Switch(config-if-range)#switchport trunk native vlan 3666504_Switch(config-if-range)#channel-group 10 mode on6504_Switch(config-if-range)#no shut

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Verify the Configs.

Show run int gig4/1

Show run int po10

show wism status

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Step 2 : Auto/Macro Gig Port Configs.

No manual port channel configs.

No configuration on the Gig ports.

4 commands and you are done !!!!6504_Switch(config)#wism module 4 controller 1 allowed-vlan 366,367,3686504_Switch(config)#wism module 4 controller 1 native-vlan 366

{ If management interface vlan = untagged }

6504_Switch(config)#wism module 4 controller 2 allowed-vlan 366,367,3686504_Switch(config)#wism module 4 controller 2 native-vlan 366

{ If management interface vlan = untagged }

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Verify the Configs.Show run int gig4/1

show wism status

Show etherchannel summary

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Show commands :

Show wism module 4 controller 1 status

WCP Keepalives

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Manual or Auto ?

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Step 3 : Logging into the WLC.New WISM will have no configs. Just like 4400 WLC.

Service port on WISM preferably should always be set for DHCP.

You configure by session into the WLC.

Session slot # processor 1|2

Use Ctrl+shift+6 x to come out of session

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VSS and WISM Configuration.VSS = Combine 2 6500 chasis to behave as one.

Similar concept for configuring wism.

You use Auto commands.6500_VSS(config)# wism switch 1 module 11 controller 1 native-vlan 3666500_VSS(config)# wism switch 1 module 11 controller 1 allowed-vlan 366,367,368

How do I know if it is switch 1 or switch 2 ? How I do know what module ?Easy : Use : show wism status, show module

Session into WLC :6500_VSS#session switch 1 slot 11 proc 16500_VSS#show wism switch 1 module 11 controller 1 status

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Important !!!Since WISM uses LAG/Port-channels we need to make sure load-balancing on switch is src-dst-ip.

The Catalyst 6500 series switches running in PFC3 or PFC3CXL mode/card implement enhanced EtherChannel load balancing. The enhanced EtherChannel load balancing adds the VLAN number to the hash function, which is incompatible with LAG. i.e { src-dst-ip enhanced }.

See CSCso79925Link for more details :

http://www.cisco.com/en/US/docs/wireless/controller/7.0/configuration/guide/c70mint.html#wp1295338

To correct add this command on 6500:

port-channel load-balance src-dst-ip ORport-channel load- balance src-dst-ip exclude vlan { command available only from SXH6 or higher and SXI4 or higher }

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Links and References :

WISM Configuration guide http://www.cisco.com/en/US/docs/wireless/technology/wism/technical/reference/appnote.html#wp73270

WISM Troubleshooting guidehttp://www.cisco.com/en/US/products/hw/modules/ps2706/products_tech_note09186a00808330a9.shtml

VSS Configuration – WISM guidehttp://www.cisco.com/en/US/products/hw/modules/ps2706/products_tech_note09186a0080a6c202.shtml

FAQ WISMhttp://www.cisco.com/en/US/products/hw/switches/ps708/products_qanda_item09186a00806e39b7.shtml#Q11

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THANK YOU !!!