HP 5500 Ei 5500 Si Switch Series Configuration Guide

 55 
Displaying and maintaining PIM snooping 
 
Task Command Remarks 
Display PIM snooping neighbor 
information. display pim-snooping neighbor
 
[ vlan  vlan-id  ] [ slot  slot-number  ] 
[ |  { begin |  exclude | include } 
regular-expression  ]  Available in any view
 
Display PIM snooping routing 
entries.  display pim-snooping 
routing-table
 [ vlan  vlan-id  ] [ slot 
slot-number  ] [ | { begin |  exclude 
|  include  } regular-expression  ] Available in any view
 
Display the statistics...

 56 
Configuration procedure 
1. Assign IP addresses: 
Configure an IP address and subnet ma sk for each interface according to Figure 20. (Details not 
shown.)

 
2.  Configure Router A: 
# Enable IP multicast routing, enable PIM-SM  on each interface, and configure interface 
GigabitEthernet 1/0/2 as a C-BSR and C-RP.  
 system-view 
[RouterA] multicast routing-enable 
[RouterA] interface gigabitethernet 1/0/1 
[RouterA-GigabitEthernet1/0/1] pim sm 
[RouterA-GigabitEthernet1/0/1] quit 
[RouterA]...

 57 
# Create VLAN 100, assign GigabitEthernet 1/0/1 through GigabitEthernet 1/0/4 to this VLAN, 
and enable IGMP snooping and PIM snooping in the VLAN.  
[SwitchA] vlan 100 
[SwitchA-vlan100] port gigabitethernet 1/0/1 to gigabitethernet 1/0/4 
[SwitchA-vlan100] igmp-snooping enable 
[SwitchA-vlan100] pim-snooping enable 
[SwitchA-vlan100] quit 
7. Verify the configuration: 
# On Switch A, display the PIM snooping neighbor information of VLAN 100. 
[SwitchA] display pim-snooping neighbor vlan 100...

 58 
Troubleshooting PIM snooping 
PIM snooping does not work 
Symptom 
PIM snooping does not work on the switch.  
Analysis 
IGMP snooping or PIM snooping is not enabled on the switch.  
Solution 
1. Use the  display current-configuration  command to check the status of IGMP snooping and PIM 
snooping. 
2.  If IGMP snooping is not enabled, enter system view and use the  igmp-snooping command to 
enable IGMP snooping globally. Then, enter VLAN view and use the  igmp-snooping enable and 
pim-snooping...

 59 
Configuring multicast VLANs 
Overview 
In the traditional multicast programs-on-demand mode shown in  Figure 21, w hen hosts (Host A, Host B 
and Host C) that belong to different VLANs requir e multicast programs-on-demand service, the Layer 3 
device, Router A, must forward a separate copy of the multicast traffic in each user VLAN to the Layer 2 
device, Switch A. This results in not only waste of network bandwidth but also extra burden on the Layer 
3 device.  
Figure 21  Multicast transmission...

 60 
Figure 22 Sub-VLAN-based multicast VLAN 
 
 
After the configuration, IGMP snooping manages router ports in the multicast VLAN and member ports 
in the sub-VLANs. When forwarding multicast data  to Switch A, Router A sends only one copy of 
multicast data to Switch A in the multicast VLAN,  and Switch A distributes the data to the multicast 
VLAN’s sub-VLANs that contain receivers.  
Port-based multicast VLAN 
As shown in  Figure 23, Ho st A, Host B, and Host C are in different user VLANs. All the...

 61 
For more information about IGMP snooping, router ports, and member ports, see Configuring IGMP 
sn
ooping .  
For more information about VLAN tags, see  Layer 2—LAN Switching Configuration Guide .  
Multicast VLAN configuration task list 
 
Task Remarks 
Configuring a sub-VLAN-based multicast VLAN 
Required 
Use either approach. 
Configuring a port-based 
multicast VLAN Configuring user port attributes 
Configuring multicast VLAN ports  
 
 
NOTE: 
If you have configured both sub-VLAN-based mult...

 62 
Step Command Remarks 
3.  Configure the specified 
VLANs as sub-VLANs of the 
multicast VLAN.  subvlan 
vlan-list  By default, a multicast VLAN has 
no sub-VLANs.  
 
Configuring a port-based multicast VLAN 
When you configure a port-based multicast VLAN, you must configure the attributes of each user port 
and then assign the ports to the multicast VLAN.  
A user port can be configured as a multicast VLAN port 
only if it is an Ethernet port, or Layer 2 aggregate 
interface.  
In Ethernet interface...

 63 
Step Command Remarks 
4.  Specify the user VLAN that 
comprises the current user 
ports as the default VLAN.  port hybrid pvid vlan
 vlan-id   VLAN 1 by default  
5.  Configure the current user 
ports to permit packets of the 
specified multicast VLANs to 
pass and untag the packets.  port hybrid vlan 
vlan-id-list 
untagged  By default, a hybrid port permits 
only packets of VLAN 1 to pass.  
 
For more information about the 
port link-type, port hybrid pvid vlan , and port hybrid vlan  commands,...

 64 
Step Command Remarks 
4.  Enter interface view or port 
group view. 
• Enter interface view: 
interface  interface-type 
interface-number  
• Enter port group view: 
port-group  manual 
port-group-name   Use either command. 
5.
  Configure the current port as 
a member port of the multicast 
VLAN.  port multicast-vlan 
vlan-id  By default, a user port does not 
belong to any multicast VLAN.  
 
Displaying and maintaining multicast VLAN 
 
Task Command Remarks 
Display information about a 
multicast...