Brocade Multi-Service IronWare Multicast Configuration Guide (Supporting R05.6.00) - Manual (Page 175)

Multi-Service IronWare Multicast Configuration Guide 163
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IPv6 PIM Sparse
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Configuring Source-specific Multicast
IPv6 PIM-SM must be enabled on any ports on which you want SSM to operate. Enter the
ssm-enable command under the IPv6 router PIM level to globally enable SSM filtering.
Brocade(config)# ipv6 router pim
Brocade(config-ipv6-pim-router)# ssm-enable ff02::200:2
To enable SSM for a specified VRF, enter the commands as shown in the following.
Brocade(config)# ipv6 router pim vrf blue
Brocade(config-ipv6-pim-router-vrf-blue)# ssm-enable ff02::200:2
Syntax: [no] ssm-enable [range address-range]
The range address-range option allows you to define the SSM range of IPv6 multicast addresses.
Modifying the Hop-Limit threshold
The Time To Live (TTL) defines the minimum value required in a packet in order for the packet to be
forwarded out the interface. For example, if the Hop-Limit for an interface is set at 10, it means that
only those packets that ingress with a TTL value of 11 or more will be forwarded out the TTL-10
interface. Thus, with a default Hop-Limit threshold of 1, only packets ingressing with a Hop-Limit of
2 or greater will be forwarded out. Note that the Hop-Limit threshold only applies to routed
interfaces. Switched interfaces ignore the Hop-Limit threshold. Possible Hop-Limit values are from
1 through 64. The default Hop-Limit value is 1. To configure a Hop-Limit of 45, enter the following
command.
Brocade(config-if-e10000-3/24)# ipv6 pim ttl-threshold 45
To configure a Hop-Limit of 45 on a virtual Ethernet interface, enter the following commands.
Brocade(config)# interface ve 10
Brocade(config-vif-10)# ipv6 pim ttl-threshold 45
Syntax: ipv6 pim ttl-threshold 1-64
Configuring a DR priority
The DR priority option lets a network administrator give preference to a particular router in the DR
election process by giving it a numerically higher DR priority. To set a DR priority higher than the
default value of 1, use the ipv6 pim dr-priority command as shown in the example below.
Brocade(config-if-e10000-3/24)# ipv6 pim dr-priority 50
To set a DR priority higher than the default value of 1 on a virtual Ethernet interface, use the ipv6
pim dr-priority command as shown in the following.
Brocade(config)# interface ve 10
Brocade(config-vif-10)# ipv6 pim dr-priority 50
Syntax: [no] ipv6 pim dr-priority priority-value
The priority-value variable is the value that you want to set for the DR priority. The range of values is
from 0 through 65535. The default value is 1.
The no option removes the command and sets the DR priority back to the default value of 1.
The following information may be useful for troubleshooting:
• If more than one router has the same DR priority on a subnet (as in the case of default DR
priority on all), the router with the numerically highest IP address on that subnet will get
elected as the DR.