OcNOS-SP : Troubleshooting Guide : Multicast : MLD
MLD
MLD not Active
Check whether vif is created for the interface:
show ipv6 mif
 
Symptom/Cause
Solution
IPv6 Multicast routing is not configured
Use these commands:
show ipv6 mld interface
Check the status of igmp
ipv6 multicast-routing
Use this command to configure multicast routing.
Interface is down
Use these commands:
show ipv6 interface brief
Check whether interface has an ipv6 address or if the status is down. If the address field is “unassigned”, configure IPv6 address on the interface with mask.
For ex:
ipv6 address 3ffe:506::1/48
no shutdown
Use this command to bring up admin status of the interface.
No MLD configuration exists
Use these commands:
ipv6 mld
Use this command to configure mld on the interface
show ipv6 mld interface
Check whether MLD is enabled.
show running-config interface IFNAME
Verify if mld is configured.
 
Note: MLD can also be enabled by ipv6 pim sparse/dense mode configuration.
Groups not Added on Receiving Dynamic Reports
 
Symptom/Cause
Solution
MLD is not active
Follow the steps above
 
MLDv2 report should have one or more sources when the group-record type is INCLUDE.
show ipv6 mld groups
The output displays the added group
Interface is configured as mld proxy
Use these commands:
show ipv6 mld proxy
Check whether mld proxy is enabled.
show running-config interface IFNAME
Check whether “ipv6 mld proxy service” configuration exists.
MLD Proxy not Active
Verify mld proxy is enabled and active:
show ipv6 mld proxy
 
Symptom/Cause
Solution
Host interface is not configured
Use these commands:
show ipv6 mld proxy
Check the upstream interface.
show running-config interface IFNAME
Check if the configuration exists.
ipv6 mld proxy-service
Configure interface as host interface (enable proxy-service).
Mroute-proxy interface not configured
Use these commands:
show ipv6 mld proxy
Check whether mroute is configured. If there is no output, mroute-proxy is not configured.
ipv6 mld mroute-proxy upstream-IFNAME
Configure mroute proxy on an interface.
Mismatch between proxy service interface and host interface.
Use these commands:
show ipv6 mld proxy
Check the upstream interface.
show running-config
Check which interface has the proxy-service configured.
ipv6 mld proxy-service
Configure proxy service on the upstream interface shown in the “show ip igmp proxy”.
IPv6 Multicast routing not configured
Use these commands:
show running-config multicast
Check whether ipv6 multicast routing is configured.
ipv6 multicast routing
If the configuration is not shown in the running-config, use this command to configure ipv6 multicast routing.
Interface is down
Follow the steps explained above
Last modified date: 06/08/2023