WISM Troubleshooting. By Salil Prabhu Cisco Systems, Inc. All rights reserved. 1

Transcription

1 WISM Troubleshooting By Salil Prabhu 2006 Cisco Systems, Inc. All rights reserved. 1

2 WISM - Cisco Wireless Services Module Line Card in Cisco Catalyst 6500 Series Switch and Cisco 7600 Routers. No External Gig ports. Communicates with Sup720 over backplane. Each WISM has 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 Cisco Systems, Inc. All rights reserved. 2

3 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 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 Cisco Systems, Inc. All rights reserved. 3

4 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.) 2006 Cisco Systems, Inc. All rights reserved. 4

5 Wireless Controller Product Portfolio , 25, 50, 100, 250,500 (LICENSE-BASED) , 25, WiSM G-25, 50 Performance & Scale WLCME-6, 8, 12, 25 H-REAP 2106, 12, # of APs 2006 Cisco Systems, Inc. All rights reserved. 5

6 Controller Comparison WiSM # of Access Points 12, 25, 50, 100, 250 *500 on 7.0 code 12, 25, 50, 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 Network I/O Up to 100 Up to 10 Up to 20 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 Power Consumption 125W 47W 164W AP count and feature upgrade via licensing Encrypted data link between AP and controller Yes No No Yes No No OfficeExtend Solution Yes No No 2006 Cisco Systems, Inc. All rights reserved. 6

7 Getting Started - Verify Module is installed in correct slot and passed diagnostic tests. Show module Cisco Systems, Inc. All rights reserved. 7

8 Verify if 6500/7600 has correct software version. Show version 2006 Cisco Systems, Inc. All rights reserved. 8

9 Verify power available on Switch. show power total show power available show power status all 2006 Cisco Systems, Inc. All rights reserved. 9

10 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 But before removing the blades, power off the module Cisco Systems, Inc. All rights reserved. 10

11 Configuring Methods Manual Flexibility Deprecated in SXI code SXF2-5 Automatic/Macro commands. Reduce configuration tasks and thus avoid errors. Cannot manually change Gig ports configurations SXF6 or higher. {supports both methods } SXH code {supports both methods } SXI code 2006 Cisco Systems, Inc. All rights reserved. 11

12 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 Cisco Systems, Inc. All rights reserved. 12

13 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 on service interface (not visible outside) 2006 Cisco Systems, Inc. All rights reserved. 13

14 Debugs on Sup720 for WCP Request 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 Cisco Systems, Inc. All rights reserved. 14

15 Debugs on WLC for WCP. WLC responding to keepalives Cisco Systems, Inc. All rights reserved. 15

16 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 WLC Cisco Systems, Inc. All rights reserved. 16

17 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-port network default-router ! ip dhcp excluded-address ! interface Vlan192 ip address end! wism service-vlan Cisco Systems, Inc. All rights reserved. 17

18 Step 2:Manual Config of Gig ports. Create port channel. 6504_Switch#config t 6504_Switch(config)#int po _Switch(config-if)# switchport 6504_Switch(config-if)# switchport trunk encapsulation dot1q 6504_Switch(config-if)# switchport mode trunk 6504_Switch(config-if-range)#switchport trunk allowed vlan 366,367, _Switch(config-if-range)#switchport trunk native vlan _Switch(config-if)#no shut Assign the port channel to Gig ports. 6504_Switch(config)#int range gigabitethernet 4/ _Switch(config-if-range)#switchport 6504_Switch(config-if-range)# switchport trunk encapsulation dot1q 6504_Switch(config-if-range)# switchport mode trunk 6504_Switch(config-if-range)#switchport trunk allowed vlan 366,367, _Switch(config-if-range)#switchport trunk native vlan _Switch(config-if-range)#channel-group 10 mode on 6504_Switch(config-if-range)#no shut 2006 Cisco Systems, Inc. All rights reserved. 18

19 Verify the Configs. Show run int gig4/1 Show run int po10 show wism status 2006 Cisco Systems, Inc. All rights reserved. 19

20 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, _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, _Switch(config)#wism module 4 controller 2 native-vlan 366 { If management interface vlan = untagged } 2006 Cisco Systems, Inc. All rights reserved. 20

21 Verify the Configs. Show run int gig4/1 show wism status Show etherchannel summary 2006 Cisco Systems, Inc. All rights reserved. 21

22 Show commands : Show wism module 4 controller 1 status WCP Keepalives 2006 Cisco Systems, Inc. All rights reserved. 22

23 Manual or Auto? 2006 Cisco Systems, Inc. All rights reserved. 23

24 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 2006 Cisco Systems, Inc. All rights reserved. 24

25 VSS and WISM Configuration. VSS = Combine 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 _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 _VSS#show wism switch 1 module 11 controller 1 status 2006 Cisco Systems, Inc. All rights reserved. 25

26 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 CSCso79925 Link for more details : To correct add this command on 6500: port-channel load-balance src-dst-ip OR port-channel load- balance src-dst-ip exclude vlan { command available only from SXH6 or higher and SXI4 or higher } 2006 Cisco Systems, Inc. All rights reserved. 26

27 Links and References : WISM Configuration guide WISM Troubleshooting guide VSS Configuration WISM guide FAQ WISM Cisco Systems, Inc. All rights reserved. 27

28 2006 Cisco Systems, Inc. All rights reserved. 28

29 THANK YOU!!! 2006 Cisco Systems, Inc. All rights reserved. 29