
80 set pim bsrcandidate Software Reference
set pim bsrcandidate
Syntax SET PIM BSRCandidate [HAShmasklength=0..32]
[INTerface=interface] [PREFerence=0..255]
where interface is the name of the interface over which multicast data is
forwarded. The interface can be either a VLAN (e.g. vlan1) or a local interface
(e.g. local1).
Description This command sets the switch’s Bootstrap Router Candidate preference.
The hashmasklength parameter specifies the number of bits of the group
number to use when selecting a rendezvous point (RP) candidate if this switch
becomes the BSR. A higher number increases the spread of groups across RPs.
The default is 30.
Note that software release versions prior to 2.7.3 did not correctly support the
PIM hash mask length option. As a result, the RP selection calculation differs
between this release and release versions prior to 2.7.3. If a network contains
switches running a mixture of versions, this leads to incorrect forwarding
behaviour. To avoid this issue, either ensure that all devices on the network
correctly support the hash mask length option (recommended), or ensure that
the following both hold:
■ The hash mask length option on all BSR candidates is configured to 4 bits.
This implies that all BSR candidates must be running 2.7.3 or later.
■ All RP candidates use a common prefix of 224.0.0.0/240.0.0.0. This has the
side effect of collapsing all groups to use a single PIM RP.
The interface parameter specifies an interface for the switch to use when
advertising itself as a candidate bootstrap router. The IP address of this
interface is advertised by the switch. The interface supplied can be either a
configured local interface or a configured VLAN interface. If the parameter is
not specified, the switch instead advertises its first active IP interface.
The preference parameter specifies the preference for this switch to become the
bootstrap router for the PIM-SM domain. A higher value indicates a greater
preference.
Examples To change the switch’s candidate BSR preference to 100 and a hash mask length
of 0, use the command:
set pim bsrc pref=100 hasmasklength=0
Related Commands add pim bsrcandidate
delete pim bsrcandidate
show pim bsrcandidate
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