In a multicast television application, a PC or a television with a set-top box can receive the multicast stream. Multiple set-top boxes or PCs can be connected to one subscriber port, which is an EFP configured as the MVR receiver. Figure 1 is an example configuration. The DHCP assigns an IP address to the set-top box or the PC. When a subscriber selects a channel, the set-top box or PC sends an IGMP report to the CPT node (CPT 200 or CPT 600 along with CPT 50) to join the appropriate multicast. If the IGMP report matches one of the configured IP multicast group addresses, the CPT system modifies the hardware address table to include this receiver EFP and bridge-domain as a forwarding destination of the specified multicast stream when it is received from the multicast bridge-domain.
When a subscriber changes channels or turns off the television, the set-top box sends an IGMP leave message for the multicast stream. The CPT system sends a MAC-based general query through the receiver EFP bridge-domain. If there is another set-top box in the bridge-domain still subscribing to this group, that set-top box must respond within the maximum response time specified in the query. If the CPT system does not receive a response, it eliminates the receiver EFP as a forwarding destination for this group.
If the Immediate Leave feature is enabled on a receiver EFP, the EFP leaves a multicast group more quickly. Without Immediate Leave, when the CPT system receives an IGMP leave message from a subscriber on a receiver EFP, it sends out an IGMP group specific query on that EFP and waits for the IGMP group membership reports. If no reports are received in a configured time period, the receiver EFP is removed from the multicast group membership. With Immediate Leave, an IGMP query is not sent from the receiver EFP where the IGMP leave was received. As soon as the leave message is received, the receiver EFP is removed from the multicast group membership, which speeds up leave latency. Enable the Immediate Leave feature only on receiver EFPs to which a single receiver device is connected.
MVR eliminates the need to duplicate television-channel multicast traffic for subscribers in each bridge-domain. Multicast traffic for all channels is only sent around the bridge domain source EFPs —only on the multicast bridge-domain. The IGMP leave and join messages are in the bridge-domain to which the subscriber port is assigned. These messages dynamically register for streams of multicast traffic in the multicast bridge-domain on the Layer 3 device. The CPT node (CPT 200 or CPT 600 along with CPT 50) modifies the forwarding behavior to allow the traffic to be forwarded from the multicast bridge domain to the subscriber port in a different bridge-domain, thereby selectively allowing traffic to cross between the two bridge-domains.
IGMP reports are sent to the same IP multicast group address as the multicast data. The CPT node (CPT 200 or CPT 600 along with CPT 50) must capture all IGMP join and leave messages from the receiver EFPs and forward them to the multicast bridge domain of the source EFP.
Figure 1. Multicast Bridge-Domain Registration Example
In a multicast television application, a PC or a television with a set-top box can receive the multicast stream. Multiple set-top boxes or PCs can be connected to one subscriber port, which is an EFP configured as the MVR receiver. Figure 1 is an example configuration. The DHCP assigns an IP address to the set-top box or the PC. When a subscriber selects a channel, the set-top box or PC sends an IGMP report to the CPT node (CPT 200 or CPT 600 along with CPT 50) to join the appropriate multicast. If the IGMP report matches one of the configured IP multicast group addresses, the CPT system modifies the hardware address table to include this receiver EFP and bridge-domain as a forwarding destination of the specified multicast stream when it is received from the multicast bridge-domain.
When a subscriber changes channels or turns off the television, the set-top box sends an IGMP leave message for the multicast stream. The CPT system sends a MAC-based general query through the receiver EFP bridge-domain. If there is another set-top box in the bridge-domain still subscribing to this group, that set-top box must respond within the maximum response time specified in the query. If the CPT system does not receive a response, it eliminates the receiver EFP as a forwarding destination for this group.
If the Immediate Leave feature is enabled on a receiver EFP, the EFP leaves a multicast group more quickly. Without Immediate Leave, when the CPT system receives an IGMP leave message from a subscriber on a receiver EFP, it sends out an IGMP group specific query on that EFP and waits for the IGMP group membership reports. If no reports are received in a configured time period, the receiver EFP is removed from the multicast group membership. With Immediate Leave, an IGMP query is not sent from the receiver EFP where the IGMP leave was received. As soon as the leave message is received, the receiver EFP is removed from the multicast group membership, which speeds up leave latency. Enable the Immediate Leave feature only on receiver EFPs to which a single receiver device is connected.
MVR eliminates the need to duplicate television-channel multicast traffic for subscribers in each bridge-domain. Multicast traffic for all channels is only sent around the bridge domain source EFPs —only on the multicast bridge-domain. The IGMP leave and join messages are in the bridge-domain to which the subscriber port is assigned. These messages dynamically register for streams of multicast traffic in the multicast bridge-domain on the Layer 3 device. The CPT node (CPT 200 or CPT 600 along with CPT 50) modifies the forwarding behavior to allow the traffic to be forwarded from the multicast bridge domain to the subscriber port in a different bridge-domain, thereby selectively allowing traffic to cross between the two bridge-domains.
IGMP reports are sent to the same IP multicast group address as the multicast data. The CPT node (CPT 200 or CPT 600 along with CPT 50) must capture all IGMP join and leave messages from the receiver EFPs and forward them to the multicast bridge domain of the source EFP.
Figure 2. Multicast Bridge-Domain Registration Example
Configuring Multicast VLAN Registration
This section provides MVR configuration guidelines and limitations, and procedures to configure MVR using Cisco IOS commands and CTC.
MVR Configuration Guidelines and Limitations
Receiver EFPs on a CPT system can be in different bridge-domains, but should not belong to the multicast bridge-domain.
The maximum number of multicast entries (MVR group addresses) that can be configured on a CPT system is 2000.
The CPT system supports up to 20 MVR bridge-domains.
The maximum number of receiver EFPs on an MVR bridge-domain is 128.
Because an MVR on the CPT system uses IP multicast addresses instead of MAC multicast addresses, aliased IP multicast addresses are allowed on the CPT system.
MVR can coexist with IGMP snooping on a CPT system.
MVR data received on an MVR receiver EFP is not forwarded to MVR source EFPs.
A physical port can have only one receiver EFP for a given MVR bridge domain.
CPT system does not support MVR in point to point bridge-domains.
Query response time is 0.5 second.
It is mandatory to untag the packets before they enter the bridge domain:
For an MVR source, the packets are untagged using the rewrite pop configuration at the EFP level.
For an MVR receiver, the rewrite pop operation is implicit. User-defined rewrite operation is used for bridge-domains that do not have MVR enabled.
Following configuration restrictions are applicable while configuring MVR source EFPs on the CPT system:
For a single tagged packet, the tag is removed using the rewrite ingress tag pop 1 symmetric command at the EFP level.
For a double tagged packet, the tag is removed using the rewrite ingress tag pop 2 symmetric command at the EFP level.
For an untagged packet, a rewrite operation is not required.
DLP-J210 Enabling or Disabling MVR on a Bridge Domain Using Cisco IOS Commands
Purpose
This procedure enables or disables MVR on a bridge domain using Cisco IOS commands.
Tools/Equipment
None
Prerequisite Procedures
None
Required/As Needed
As needed
Onsite/Remote
Remote
Security Level
None
Procedure
Command or Action
Purpose
Step 1
enable
Example:Router> enable
Enables privileged EXEC mode.
Enter your password if prompted.
Step 2
configure terminal
Example:Router# configure terminal
Enters global configuration mode.
Step 3
bridge domainbridge-domain value
Example:Router(config)# bridge-domain 22
Enters the bridge-domain configuration mode.
Enter the value of the bridge-domain.
Step 4
[no] mvr
Example:Router(config-bdomain)# mvr
Enables MVR on the bridge-domain. The no form of the command disables MVR.
Step 5
[no] mvr groupip-address count
Example:Router(config-bdomain)# mvr group 228.1.23.4 5
Defines a global range of IP multicast groups on which MVR must
be enabled. The optional count parameter is used to configure a contiguous series of MVR group addresses (the range for count is from 1 to 2000; the default is 1). Any multicast data sent to the IP address mentioned in the command is sent to all source EFPs on the CPT system and all receiver EFPs that have elected to receive data on that multicast address. The no form of the deletes the multicast IP address configuration.
ip-address—Group IP address.
count—Group count inside the bridge domain.
Step 6
end
Example:Router(config-bdomain)# end
Exits the bridge domain configuration mode and returns to privileged EXEC mode.
Step 7
show mvr
Example:Router#show mvr
Verifies the configuration.
Step 8
copy running-config startup-config
Example:copy running-config startup-config
(Optional) Saves your entries in the configuration file.
Examples:
The following example shows how to enable MVR on bridge domain 22 and configure the group address.
Router(config)# bridge-domain 22
Router(config-bdomain)# mvr
Router(config-bdomain)# mvr group 228.1.23.4 5
Router(config-bdomain)# end
The following example shows how to disable MVR on bridge domain 22 and group address.
Router(config)# bridge-domain 22
Router(config-bdomain)# no mvr
Router(config-bdomain)# no mvr group 228.1.23.4 5
Router(config-bdomain)# end
The following example shows how to verify the MVR multicast group addresses on the CPT system.
Router# show mvr groups
MVR multicast VLAN: 20
MVR max Multicast Groups allowed: 2000
MVR current multicast groups: 20
MVR groups:
Group start Group end Type Count/Mask
--------------- --------------- ----- ---------------
230.1.2.3 230.1.2.22 count 20
DLP-J211 Enabling or Disabling MVR on the Source and Receiver EFPs Using Cisco IOS Commands
Purpose
This procedure enables or disables MVR on the source and receiver EFPs:
Step 1 through Step 9 explains MVR configuration of the source EFP.
Step 10 through Step 15 explains MVR configuration of the receiver EFP.
Users must configure an MVR bridge domain before configuring the MVR source and receiver EFPs. Step 1 through Step 9 explains MVR configuration of the source EFP. Step 8 through Step 16 explains MVR configuration of the receiver EFP.
The mvr type {source | receiver bridge-domain id[vlan id] [immediate]} command is used to configure the EFPs, where bridge-domain id[vlan id] [immediate] is only applicable to the receiver EFPs.
Specifies the type and location of the interface to configure, where:
type—Specifies the type of the interface.
number—Specifies the location of the interface.
Step 4
service instanceidethernet
Example:Router(config-if)# service instance 10 ethernet
Configures an Ethernet service instance on an interface.
Step 5
encapsulation dot1q vlan-id
Example:
Router(config-if-srv)# encapsulation dot1q 10
Defines the matching criteria to be used in order to map ingress dot1q frames on an interface to the appropriate service instance.
Step 6
rewrite ingress tag pop {1|2} symmetric
Example:Router(config-if-srv)# rewrite ingress tag pop 1 symmetric
Specifies the rewrite operation.
Step 7
bridge-domainbridge-domain id
Example:Router(config-if-srv)# bridge-domain 22
Enters the bridge-domain
Step 8
[no] mvr type source
Example:Router(config-if-srv)#mvr type source
Configures an MVR EFP as the source. Subscribers cannot be directly connected to the source EFPs. All source EFPs on a CPT system belong to the single multicast bridge-domain. The no form of the command removes the MVR source EFP configuration.
Defines the matching criteria to be used in order to map ingress dot1q frames on an interface to the appropriate service instance.
Step 13
bridge-domainbridge-domain id
Example:Router(config-if-srv)# bridge-domain 100
Enters the bridge-domain
Step 14
[no] mvr type receiver bridge-domainid[vlanvlan-id] [immediate]
Example:
Router(config- if-srv)# mvr type receiver bridge-domain 22 immediate
or
Router(config-if-srv)# mvr type receiver bridge-domain 22 vlan 200
Configures an MVR EFP (subscriber port) as the receiver to receive only multicast data. It does not receive data unless it becomes a member of the multicast group, either statically or by using IGMP leave and join messages. Receiver EFPs cannot belong to the multicast bridge-domain. The no form of the command removes the MVR receiver EFP configuration.
immediate— (Optional) Enables the Immediate-Leave feature on the receiver EFP.
Note
This command applies to only receiver EFPs and should only be enabled on receiver EFPs to which a single receiver device is connected.
vlanvlan-id— (Optional) Specifies the VLAN ID to be used when the VLAN range is mentioned. This option is used only on the receiver EFP.
Step 15
end
Example:Router(config-if-srv)# end
Returns to privileged EXEC mode.
Step 16
show mvr
Example:Router(config)# show mvr
Verifies the configuration.
Step 17
copy running-config startup-config
Example:copy running-config startup-config
(Optional) Saves your entries in the configuration file.
Examples:
To return the CPT system to its default settings, use the no mvr [typetype| immediate | vlanvlan-id] command in the interface configuration mode.
This example shows how to configure an EFP as a receiver and receive multicast traffic sent to the multicast group address. It also shows how to enable Immediate Leave on the receiver EFP and verify the results.
Router(config)# interface TengigabitEthernet 6/3
Router(config-if)# service instance 100 ethernet
Router(config-if-srv)# encapsulation dot1q 10
Router(config-if-srv)# rewrite ingress tag pop 1 symmetric
Router(config-if-srv)# bridge-domain 100
Router(config-if-srv)# mvr type receiver bridge-domain 22 immediate
end
Router(config)#show mvr receiver
This example shows how to disable MVR on the receiver EFP.
Router(config)# interface TengigabitEthernet 6/3
Router(config-if)# service instance 100 ethernet
Router(config-if-srv)# no mvr type receiver bridge-domain 22 immediate
Router(config-if-srv)# no service instance 100 ethernet
This example shows how to configure an EFP as a receiver with encapsulation range, and receive multicast traffic sent to the multicast group address. It also shows how to enable Immediate Leave on the receiver EFP.
This example shows how to configure an EFP as a receiver with encapsulation ID, and receive multicast traffic sent to the multicast group address. It also shows how to enable Immediate Leave on the receiver EFP.
Router(config)# interface gi36/2
Router(config-if)# service instance 10 ethernet
Router(config-if-srv)# encapsulation dot1q 10
Router(config-if-srv)# rewrite ingress tag push dot1q 100 symmetric
Router(config-if-srv)# bridge-domain 100
Router(config-if-srv)# mvr type receiver bridge-domain 22 immediate
This example shows how to enable MVR on the source EFP.
Router(config)# TengigabitEthernet 6/3
Router(config-if)# service instance 100 ethernet
Router(config-if-srv)# encapsulation dot1q 12
Router(config-if-srv)# rewrite ingress tag pop 1 symmetric
Router(config-if-srv)# bridge-domain 22
Router(config-if-srv)# mvr type source
This example shows how to disable MVR on the source EFP.
Router(config)# TengigabitEthernet 6/3
Router(config-if)# service instance 100 ethernet
Router(config-if-srv)# no mvr type source
Router(config-if-srv)# no service instance 100 ethernet
This example shows how to enable MVR on the bridge domains and configure source MVR EFPs and receiver MVR EFPs.
! Enabling MVR on the bridge domain 22 and bridge domain 30.
Router(config)# bridge-domain 22
Router(config-bdomain)# mvr
Router(config-bdomain)# mvr group 225.0.0.1 5
Router(config-bdomain)# end
Router(config)# bridge-domain 30
Router(config-bdomain)# mvr
Router(config-bdomain)# mvr group 226.0.0.1 5
! Configuring source EFP on the bridge domain 22.
Router(config)# TengigabitEthernet 6/3
Router(config-if)# service instance 100 ethernet
Router(config-if-srv)# encapsulation dot1q 12
Router(config-if-srv)# rewrite ingress tag pop 1 symmetric
Router(config-if-srv)# bridge-domain 22
Router(config-if-srv)# mvr type source
! Configuring receiver EFP on the bridge domain 50.
Router(config)# interface TengigabitEthernet 5/3
Router(config-if)# service instance 100 ethernet
Router(config-if-srv)# encapsulation dot1q 10
Router(config-if-srv)# rewrite ingress tag pop 1 symmetric
Router(config-if-srv)# bridge-domain 50
Router(config-if-srv)# mvr type receiver bridge-domain 22 immediate
! Configuring source EFP on the bridge domain 30.
Router(config)# TengigabitEthernet 4/3
Router(config-if)# service instance 100 ethernet
Router(config-if-srv)# encapsulation dot1q 12
Router(config-if-srv)# rewrite ingress tag pop 1 symmetric
Router(config-if-srv)# bridge-domain 30
Router(config-if-srv)# mvr type source
! Configuring receiver EFP on the bridge domain 60.
Router(config)# interface TengigabitEthernet 2/3
Router(config-if)# service instance 100 ethernet
Router(config-if-srv)# encapsulation dot1q 10
Router(config-if-srv)# rewrite ingress tag push dot1q 100 symmetric
Router(config-if-srv)# bridge-domain 60
Router(config-if-srv)# mvr type receiver bridge-domain 30 immediate
! Configuring receiver EFP on the bridge domain 60 encapsulation range.
Router(config)# interface TengigabitEthernet 2/4
Router(config-if)# service instance 200 ethernet
Router(config-if-srv)# encapsulation dot1q 10-1000
Router(config-if-srv)# bridge-domain 60
Router(config-if-srv)# mvr type receiver bridge-domain 30 immediate vlan 20
DLP-J229 Viewing MVR Configuration Using Cisco IOS Commands
Purpose
This procedure explains how to view MVR configuration using Cisco IOS commands.
Tools/Equipment
None
Prerequisite Procedures
None
Required/As Needed
As needed
Onsite/Remote
Remote
Security Level
None
Procedure
Command or Action
Purpose
Step 1
enable
Example:Router> enable
Enables privileged EXEC mode.
Enter your password if prompted.
Step 2
show mvr [source-ports] [receiver-ports] [groups]
Example:Router# show mvr
Displays MVR status and values for all the bridge-domains where MVR is enabled. It provides the number of groups configured per bridge domain and displays all receiver and source EFPs.
Step 3
show ip igmp snooping [groups] [querier]
Example:Router# show ip igmp snooping
(Optional) Displays the querier and snooping information.
Examples
This example shows how to view MVR receiver port configuration.
Router# show mvr receiver-ports
Joins: v1,v2,v3 counter shows total IGMP joins
v3 counter shows IGMP joins received with both MVR and non-MVR groups
Port VLAN Status Immediate Joins
Leave (v1,v2,v3) (v3)
--------- ---- ------------- ---------- ---------- ----------
Po10 100 ACTIVE /UP DISABLED 0 0
Gi40/2 100 ACTIVE /UP DISABLED 0 0
Po10 200 ACTIVE /UP DISABLED 0 0
Gi40/2 101 ACTIVE /UP DISABLED 0 0
This example shows how to view MVR source port configuration.
Router# show mvr source-ports
Joins: v1,v2,v3 counter shows total IGMP joins
v3 counter shows IGMP joins received with both MVR and non-MVR groups
Port VLAN Status Immediate Joins
Leave (v1,v2,v3) (v3)
--------- ---- ------------- ---------- ---------- ----------
Gi36/2 1 ACTIVE /UP DISABLED 0 0
Gi36/2 2 ACTIVE /UP DISABLED 0 0
This example shows how to view MVR group details.
Router# show mvr groups
MVR multicast VLAN: 1
MVR max Multicast Groups allowed: 2000
MVR current multicast groups: 60
MVR groups:
Group start Group end Type Count/Mask
--------------- --------------- ----- ---------------
224.1.1.1 224.1.1.20 count 20
225.1.1.1 225.1.1.20 count 20
229.1.1.1 229.1.1.10 count 10
230.1.1.1 230.1.1.10 count 10
MVR multicast VLAN: 2
MVR max Multicast Groups allowed: 2000
MVR current multicast groups: 60
MVR groups:
Group start Group end Type Count/Mask
--------------- --------------- ----- ---------------
224.1.1.1 224.1.1.20 count 20
225.1.1.1 225.1.1.20 count 20
229.1.1.1 229.1.1.10 count 10
230.1.1.1 230.1.1.10 count 10
This example shows how to view snooping details.
Router# show ip igmp snooping groups
Flags: I -- IGMP snooping, S -- Static, P -- PIM snooping, A -- ASM mode
Vlan Group/source Type Version Port List
-----------------------------------------------------------------------
1 229.1.1.1 I v3 Po10 Gi40/2
1 229.1.1.2 I v3 Po10 Gi40/2
1 229.1.1.3 I v3 Po10 Gi40/2
1 229.1.1.4 I v3 Po10 Gi40/2
1 229.1.1.5 I v3 Po10 Gi40/2
1 229.1.1.6 I v3 Po10 Gi40/2
1 229.1.1.7 I v3 Po10 Gi40/2
1 229.1.1.8 I v3 Po10 Gi40/2
1 229.1.1.9 I v3 Po10 Gi40/2
1 229.1.1.10 I v3 Po10 Gi40/2
This example shows how to view querier details.
Router# show ip igmp snooping querier
Vlan IP Address IGMP Version Port
-------------------------------------------------------------
1 12.12.12.12 v3 Gi36/2
This example shows how to view generic MVR details.
Router# show mvr
MVR Running: TRUE
MVR multicast VLAN: 2
MVR Max Multicast Groups: 2000
MVR Current multicast groups: 100
MVR Global query response time: 5 (tenths of sec)
NTP-J70 Configuring MVR Using CTC
Purpose
This procedure explains how to enable MVR on the bridge domain, create a source MVR EFP, a receiver MVR EFP, and disable MVR.
Tools/Equipment
None
Prerequisite Procedures
Create an Ethernet Virtual Private LAN EVC circuit with the following conditions:
Type of VLAN Tagging:
Double Tagged
Single Tagged
Untagged
Rewrite Operation:
POP 1 for Single Tagged
POP 2 for Double Tagged
N/A for Untagged
Note
While creating an EVPLAN circuit, the source EFP and the receiver EFP of the same MVR bridge domain cannot be present on the same physical port.
An MVR source is configured on the EVPLAN circuit that has MVR enabled; however, an MVR receiver is configured on the EVPLAN circuit that does not have MVR enabled.
Procedure
Step 1
Complete the NTP-J22 Log into CTC procedure at a node where you want to enable MVR.
Step 2
In the node view, click the Layer2+ tab.
Step 3
Click Carrier Ethernet.
Step 4
From the list of Ethernet Virtual Circuits (EVCs), select an Ethernet Virtual Private LAN EVC circuit to enable MVR.
Step 5
Click Edit. The Edit Circuit dialog box appears. In the MVR tab, specify
the multicast settings for the bridge domain as described in the subsequent steps.
Step 6
To enable MVR on the bridge domain, do the following:
Check the MVR check box to enable MVR for this bridge domain.
Note
To disable MVR, uncheck the MVR check box.
Click Apply.
Step 7
To add multicast IP addresses for the bridge domain, do the following:
Check Multicast IP Address Configuration. The
Multicast IP Addresses dialog box appears.
Enter one or more multicast IP address in the
IP Address field and click Add. The added multicast
addresses appear in the IP Addresses area.
Note
When the EVPLAN circuit spans across more than one node in the network, the Multicast IP address configuration must be performed on all those nodes.
Click Apply.
Step 8
To create an MVR source EFP, do the following:
From the MVR Type drop-down list, choose Source for each EFP.
Note
Choose None to remove the MVR type from the EFP.
Enter one or more multicast IP address in the IP Address field and click Add. The added multicast addresses
appear in the IP Addresses area.
Click Apply and close the Multicast IP Addresses dialog box.
Step 9
To create an MVR receiver EFP, do the following:
From the MVR Type drop-down list, choose Receiver for each EFP.
Note
Choose None to remove the MVR type from the EFP.
Click the Source Service ID field and select an MVR enabled service.
Check the Immediate Leave check box. When you enable Immediate Leave, MVR immediately removes
a port when it detects a leave message on that port.
Note
In case of VLAN range in the MVR receiver configuration, specify the Egress VLAN ID.
Click Apply.
Step 10
To disable MVR on the bridge-domain, source MVR EFP, or receiver MVR EFP, do the following: