R21xx-HP FlexFabric 11900 IP Multicast Configuration Guide
Table Of Contents
- Title Page
- Contents
- Multicast overview
- Configuring IGMP snooping
- Overview
- IGMP snooping configuration task list
- Configuring basic IGMP snooping functions
- Configuring IGMP snooping port functions
- Configuring IGMP snooping policies
- Displaying and maintaining IGMP snooping
- IGMP snooping configuration examples
- Troubleshooting IGMP snooping
- Configuring multicast routing and forwarding
- Configuring IGMP
- Configuring PIM
- Overview
- Configuring PIM-DM
- Configuring PIM-SM
- Configuring common PIM features
- Displaying and maintaining PIM
- PIM configuration examples
- Troubleshooting PIM
- Configuring MLD snooping
- Overview
- MLD snooping configuration task list
- Configuring basic MLD snooping functions
- Configuring MLD snooping port functions
- Configuring MLD snooping policies
- Displaying and maintaining MLD snooping
- MLD snooping configuration examples
- Troubleshooting MLD snooping
- Configuring IPv6 multicast routing and forwarding
- Configuring MLD
- Configuring IPv6 PIM
- PIM overview
- Configuring IPv6 PIM-DM
- Configuring IPv6 PIM-SM
- Configuring common IPv6 PIM features
- Displaying and maintaining IPv6 PIM
- IPv6 PIM configuration examples
- Troubleshooting IPv6 PIM
- Support and other resources
- Index
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Troubleshooting MLD snooping
Layer 2 multicast forwarding cannot function
Symptom
Layer 2 multicast forwarding cannot function through MLD snooping.
Analysis
MLD snooping is not enabled.
Solution
1. Use the display mld-snooping command to display MLD snooping status.
2. If MLD snooping is not enabled, use the mld-snooping command in system view to enable MLD
snooping globally, and then use the mld-snooping enable command in VLAN view to enable MLD
snooping for the VLAN.
3. If MLD snooping is enabled globally but not enabled for the VLAN, use the mld-snooping enable
command in VLAN view to enable MLD snooping for the VLAN.
IPv6 multicast group filter does not work
Symptom
Hosts can receive multicast data from IPv6 multicast groups that are not permitted by the IPv6 multicast
group filter.
Analysis
• The IPv6 ACL is incorrectly configured.
• The IPv6 multicast group filter is not correctly applied.
• The function of dropping unknown IPv6 multicast data is not enabled, so unknown IPv6 multicast
data is flooded.
Solution
1. Use the display acl ipv6 command to verify that the configured IPv6 ACL meets the IPv6 multicast
group filter requirements.
2. Use the display this command in MLD-snooping view or in a corresponding interface view to verify
that the correct IPv6 multicast group filter has been applied. If not, use the group-policy or
mld-snooping group-policy command to apply the correct IPv6 multicast group filter.
3. Use the display mld-snooping command to verify that the function of dropping unknown IPv6
multicast data is enabled. If not, use the mld-snooping drop-unknown command to enable
dropping unknown IPv6 multicast data.