- Auto Anchor SSID between Wireless LAN Controllers acting as MC
- Enabling Central Web Authentication on ISE
- Configuring Auto Anchor and Mobility Groups on Wireless Services
- Configuring Wireless Multicast on Wireless LAN Controllers
- Converged Access Consolidated Quick Reference Templates for Wireless LAN
- Converged Access Controller AP Join Issue Troubleshoot with Traces
- Converged Access Controllers MAC Address Entry for Network Mobility Service Protocol
- Configuration Example: Converged Access Management through Prime Infrastructure with SNMP v2 and v3
- Converged Access Path Maximum Transmission Unit Discovery
- Third-Party Certificate Installation on Converged Access Wireless LAN Controllers
- Configuration Example: Converged Access for WLC EAP-FAST with Internal RADIUS Server
- Converged Access and WLC Local EAP Authentication Configuration Example
- Configuration Example: Custom Web Authentication with Local Authentication
- Dynamic VLAN Assignment with Converged Access and ACS 5.2 Configuration Example
- Configuration Example: External RADIUS Server EAP Authentication
- External Web Authentication on Converged Access
- Installing Wireless Services
- Local Web Authentication with External RADIUS Authentication
- Local Web Authentication on Converged Access
- PEAP Authentication with Microsoft NPS Configuration
- QoS on Converged Access Controllers and Lightweight Access Points
- Configuration Example: TACACS Administrator Access to Converged Access Wireless LAN Controllers
- Configuration Example: Unified Access WLC Guest Anchor with Converged Access
- VideoStream Troubleshooting
- Custom Web Authentication Locally Hosted on WLC or an External Server
- Wireless Converged Access Chromecast Configuration Example
- Web Passthrough Configuration Example
- Configuration Examples: WPA2-PSK and Open Authentication
Configuring Wireless Multicast on Wireless LAN Controllers
This document describes how to configure wireless multicast, which supports multicast with unicast delivery mechanism, on Cisco Catalyst 3850 Series Switches with WLCs.
- Prerequisites
- Configuring Multicast on Converged Access Platforms
- Configuring Multicast Flow on Converged Access
- Verifying the Wireless Multicast Configuration on Wireless LAN Controller
- Troubleshooting Wireless Multicast Configuration on Wireless LAN Controller Issues
Prerequisites
We recommend that you have a basic knowledge of the multicast implementation on Cisco Catalyst 3850 Series Switches with WLC.
Supported Platforms and Releases
 Note | The information in this document refers to devices in a specific lab environment. Descriptions of the devices is provided with default configuration values. If you are on a live network, you must understand the potential impact of all the commands. |
Configuring Multicast on Converged Access Platforms
To enable multicast on the Converged Access platforms, perform the following tasks:
Configuring Multicast Flow on Converged Access
The following steps outline the multicast traffic flow on the Converged Access. Refer to the Configuring Multicast on Converged Access Platforms section for configuration details.
| Step 1 |
Cisco WLC intercepts the IGMP packets sent by wireless clients. If there is an existing entry for the multicast group-vlan-source combination client, Cisco WLC updates the IGMP timers. If this is a new entry, Cisco WLC creates a Multicast Group Identifier (MGID) based on the tuple (source, group, and VLAN) with a multiple range, either between 1 and 4,095 for Layer 2 (L2) or between 4,160 and 8,191 for Layer 3 (L3). | ||
| Step 2 | The IGMP packet is forwarded as an upstream. | ||
| Step 3 | The MGID entry is sent to an AP along with the associated client information, to receive the multicast traffic on a client. | ||
| Step 4 |
| ||
| Step 5 |
The AP then forwards the traffic to each client, as per the requirement. |
Verifying the Wireless Multicast Configuration on Wireless LAN Controller
To verify the configuration, perform the following steps:
| Step 1 |
To verify whether multicast is enabled properly, use the show wireless multicast command in EXEC mode: Device# show wireless multicast Multicast: Enabled AP Capwap Multicast: Multicast AP Capwap Multicast group Address: 239.255.255.249 AP Capwap Multicast QoS Policy Name: unknown AP Capwap Multicast QoS Policy State: None Wireless Broadcast: Disabled Wireless Multicast non-ip-mcast: Disabled Vlan Non-ip-mcast Broadcast MGID -------------------------------- 1 Enabled Enabled Disabled 10 Enabled Enabled Enabled 24 Enabled Enabled Enabled 25 Enabled Enabled Enabled 26 Enabled Enabled Enabled 32 Enabled Enabled Enabled | ||
| Step 2 |
To verify whether an MGID entry is created for the multicast group the client attempts to join (239.255.255.250 is used as an example), use the show wireless multicast group summary command in EXEC mode: Device# show wireless multicast group summary IPv4 groups ------------- MGID Source Group Vlan -------------------------------------- 4160 0.0.0.0 239.255.255.250 32 | ||
| Step 3 |
Device# show wireless multicast group 239.255.255.250 vlan 32 Source : 0.0.0.0 Group : 239.255.255.250 Vlan : 32 MGID : 4160 Number of Active Clients : 1 Client List ------------- Client MAC Client IP Status --------------------------------------- 1410.9fef.272c 192.168.24.50 MC_ONLY | ||
| Step 4 |
Device# show capwap mcast mgid id 4160 L3 MGID = 4160 WLAN bitmap = 0x0001 Slot map/tx-cnt: R0:0x0000/0 R1:0x0001/1499 Clients per Wlan Wlan: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 !! This shows the number of clients per slot, per Service Set Identification (SSID) on the AP. Normal Mcast Clients R0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Normal Mcast Clients R1: 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 rx pkts = 1499 drp pkts = 0 tx packets: wlan : 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 slots0 : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 slots1 : 1499 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Normal Mcast Clients: Client: 1410.9fef.272c --- Qos User Priority: 0
| ||
| Step 5 |
Device# show ip igmp snooping igmpv2-tracking Client to SGV mappings ---------------------- Client: 192.168.24.50 Port: Ca1 Group: 239.255.255.250 Vlan: 32 Source: 0.0.0.0 blacklisted: no !! If the client has joined more than one multicast group, all the group entries will be shown here one after the other. SGV to Client mappings ---------------------- Group: 239.255.255.250 Source: 0.0.0.0 Vlan: 32 Client: 192.168.24.50 Port: Ca1 Blacklisted: no !! If there is more than one client entry, these will be shown here. | ||
| Step 6 |
Device# show ip igmp snoop wireless mgid Total number of L2-MGIDs = 33 Total number of MCAST MGIDs = 0 Wireless multicast is Enabled in the system Vlan bcast nonip-mcast mcast mDNS-br mgid Stdby Flags 1 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 100 Enabled Disabled Enabled Enabled Disabled 0:1:1:0 115 Enabled Disabled Enabled Enabled Disabled 0:1:1:0 517 Enabled Disabled Enabled Enabled Disabled 0:1:1:0 518 Enabled Disabled Enabled Enabled Disabled 0:1:1:0 519 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 520 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 521 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 522 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 523 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 524 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 525 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 526 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 527 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 528 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 529 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 530 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 531 Enabled Disabled Enabled Enabled Enabled 0:1:1:1 1002 Enabled Enabled Enabled Enabled Disabled 0:0:1:0 1003 Enabled Enabled Enabled Enabled Disabled 0:0:1:0 1004 Enabled Enabled Enabled Enabled Disabled 0:0:1:0 1005 Enabled Enabled Enabled Enabled Disabled 0:0:1:0 Index MGID (S, G, V) -------------------------------------------------------- |
Troubleshooting Wireless Multicast Configuration on Wireless LAN Controller Issues
To troubleshoot the configuration issues from Cisco WLC, use the following commands:
debug ig ipmp snooping
debug ip igmp snooping 239.255.255.250
debug ip igmp snooping querier
debug ip igmp snoop wireless ios client-tracking
debug ip igmp snoop wireless ios events
debug ip igmp snoop wireless ios error
debug ip igmp snoop wireless ap detail
debug ip igmp snoop wireless ap error
debug ip igmp snoop wireless ap event
debug ip igmp snoop wireless ap message
debug platform l2m-igmp
debug l2mcast wireless ios error
debug l2mcast wireless ios mgid
debug l2mcast wireless ios spi
debug l2mcast wireless ios ipc
debug l2mcast wireless ios broadcast
Note | To avoid performance issues, ensure that you use the relevant multicast debug commands. |
Device# show debug NG3K Wireless: NG3K WIRELESS Error DEBUG debugging is on L3 Multicast platform: NGWC L3 Multicast Platform debugs debugging is on L2M IGMP platform debug: NGWC L2M IGMP Platform debugs debugging is on NGWC L2M IGMP SPI debugs debugging is on NGWC L2M IGMP Error debugs debugging is on IP multicast: IGMP debugging is on for 239.10.10.11 IGMP tracking: igmpv2 tracking debugging is on L2MC Wireless: L2MC WIRELESS SPI EVENTS debugging is on L2MC WIRELESS REDUNDANCY EVENTS debugging is on L2MC WIRELESS ERROR debugging is on IGMP Wireless: IGMP SNOOP wireless IOS Errors debugging is on IGMP SNOOP wireless IOS Events debugging is on igmp/snooping/wireless/ap/event debugging is on multicast/event debugging is on igmp/snooping/wireless/ap/message/rx debugging is on igmp/snooping/wireless/ap/message/tx debugging is on wireless/log debugging is on l2multicast/error debugging is on igmp/snooping/wireless/ap/error debugging is on multicast/error debugging is on multicast debugging is on l2multicast/event debugging is on wireless/platform debugging is on igmp/snooping/wireless/ap/detail debugging is on
*Sep 7 00:12:11.029: IGMPSN: Received IGMPv2 Report for group 239.255.255.250 received on Vlan 32, port Ca1 *Sep 7 00:12:11.029: IGMPSN: group: Received IGMPv2 report for group 239.255.255.250 from Client 192.168.24.50 received on Vlan 32, port Ca1 *Sep 7 00:12:11.029: (l2mcast_tracking_is_client_blacklisted) Client: 192.168.24.50 Group: 239.255.255.250 Source: 0.0.0.0 Vlan: 32 Port: Ca1 *Sep 7 00:12:11.029: (l2mcsn_process_report) Allocating MGID for Vlan: 32 (S,G): :239.255.255.250 *Sep 7 00:12:11.029: (l2mcast_wireless_alloc_mcast_mgid) Vlan: 32 Source: 0.0.0.0 Group: 239.255.255.250 *Sep 7 00:12:11.030: (l2mcast_wireless_alloc_mcast_mgid) Hash entry added! *Sep 7 00:12:11.030: (l2mcast_wireless_track_and_inform_client) Protocol: IGMPSN Client-address: 192.168.24.50 (S,G,V): 0.0.0.0 239.255.255.250 32 Port: Ca1, MGID: 4160 Add: Add *Sep 7 00:12:11.030: (l2mcast_get_client_params) Client Addr: 192.168.24.50 Client-id: 40512055681220617 Mcast-vlan: 32(l2mcast_wireless_inform_client) Protocol: IGMPSN Client-address: 192.168.24.50 (S,G,V): 0.0.0.0 239.255.255.250 32 Port: Ca1, iifid = 0x9667C000000004 MGID: 4160 Add: Add *Sep 7 00:12:11.030: (l2mcast_wireless_inform_client) Sent INFORM CLIENT SPI *Sep 7 00:12:11.030: (l2mcast_wireless_track_and_inform_client) l2mcast_wireless_inform_client passed *Sep 7 00:12:11.032: %IOSXE-7-PLATFORM: 1 process wcm: IGMP has sent the WCM_INFORM_CLIENT with ^I client_id = 40512055681220617/8fed8000000009 ^I capwap id = 42335320837980164 ^I mac_addr = 1410.9fef.272c ^I num_entry = 1
*Sep 7 00:12:11.032: %IOSXE-7-PLATFORM: 1 process wcm: i = 0, source = 0.0.0.0 group = 239.255.255.250 client_ip = 192.168.24.50 vlan = 32, mgid = 4160 add = 1 *Sep 7 00:12:11.032: %IOSXE-7-PLATFORM: 1 process wcm: in igmp_wcm_client_join_callback source = 0.0.0.0 group = 239.255.255.250 client_ip = 192.168.24.50 vlan = 32 client_mac = 1410.9fef.272c mgid = 4160 *Sep 7 00:12:11.032: %IOSXE-7-PLATFORM: 1 process wcm: apfMswtp_iifid = 9667c000000004 capwap_if_id = 9667c000000004 *Sep 7 00:12:11.032: %IOSXE-7-PLATFORM: 1 process wcm: rrc_manual_mode = 0 rrc_status = 2 *Sep 7 00:12:11.032: %IOSXE-7-PLATFORM: 1 process wcm: locking mgid Tree in file bcast_process.c line 491 *Sep 7 00:12:11.033: %IOSXE-7-PLATFORM: 1 process wcm: allocateL3mgid: mgid entry AVL search key dump: *Sep 7 00:12:11.033: %IOSXE-7-PLATFORM: 1 process wcm: 00000000: 00 00 00 00 ef 01 01 01 00 08 ff ff ff ff ff ff ................^M 00000010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................^M 00000020: ff ff ..^M *Sep 7 00:12:11.033: %IOSXE-7-PLATFORM: 1 process wcm: mcast_group_client_lookup: Lookup failed for client with mac 1410.9fef.272c *Sep 7 00:12:11.033: %IOSXE-7-PLATFORM: 1 process wcm: unlocking mgid Tree in file bcast_process.c line 624 *Sep 7 00:12:11.033: %IOSXE-7-PLATFORM: 1 process wcm: spamLradSendMgidInfo: ap = 0C85.25C7.9AD0 slotId = 1, apVapId = 1, numOfMgid = 1 join = 1 isL2Mgid = 0, mc2ucflag = 0, qos = 0 *Sep 7 00:12:11.033: %IOSXE-7-PLATFORM: 1 process wcm: mscbApMac = 0c85.25c7.9ad0 client_mac_addr = 1410.9fef.272c slotId = 1 vapId = 1 mgid = 4160 numOfSGs = 2, rrc_status = 2
To troubleshoot configuration issues from the AP, use the following commands:
debug capwap mcast fwd
debug capwap mcast query
*Sep 7 06:00:38.099: CAPWAP MCAST: capwapDecodeMgidPayload: mgidTypeStr L3 IGMP MGID ADD,mgidType 53,mgid=4160,mgid operation=1 *Sep 7 06:00:38.099: CAPWAP MCAST: capwapAddMgidEntry: slotId= 1, client_mac= 1410.9fef.272c, mgid= 4160, wlanid= 0, mc2ucflag= 0, priority= 0, downpriority= 0 L3 mgid flag = L3 IGMP MGID . *Sep 7 06:00:38.099: CAPWAP MCAST: allocateMgidEntry: mgid = 4160, isL3Mgid=1 *Sep 7 06:00:38.099: CAPWAP MCAST: capwap_bss_mgid_enable:MGID 4160 enable - Slot=1 WLAN=1 *Sep 7 06:00:38.099: CAPWAP MCAST: L3 IGMP MGID ADD MGID = 4160 SUCCESSFUL.!!
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Use the following commands for further analysis from Cisco WLC:
show wireless client summary
show wcdb database all
show wireless multicast group summary
show wireless multicast group <ip> vlan <id>
show wireless multicast source <ip> group <ip> vlan <id>
show ip igmp snooping wireless mgid
show ip igmp snooping igmpv2-tracking
Use the following commands for further analysis from the AP:
show capwap mcast mgid all
show capwap mcast mgid id <id>
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