APC IP DSLAM Betriebsanweisung PDF herunterladen (Seite 432)

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leavemode Normal |

Fast | FastNormal

This parameter specifies the Igmp Snooping

Leave message processing mode for the port. If

the mode is set to 'Normal', the Leave message

is forwarded to the Querier. Then, based on the

Query received from Querier, the Leave

processing is triggered. If the mode is set to

'Fast', the port is immediately deleted from that

multicast group on Leave message reception

and then the Leave message is forwarded. The

mode should be set to 'Fast' for a port only if

there is one host behind the port. This is

because if there are multiple hosts behind the

port then it will lead to traffic disruption for other

hosts who might still be listening to that multicast

group. If the mode is set to 'FastNormal', the

Leave message is forwarded and the Leave

processing is triggered immediately without

waiting for any trigger from the Querier. The

'FastNormal' mode, thus, saves the delay (equal

to the time taken for Leave message to reach

router and Querier processing time for it and the

time taken for Query to reach IGMP Snoop

module) in Leave processing.

Type: Modify -- Optional

Valid values: op module) in Leave processing.

pktpriority <pktpriority-

val> | none

This parameter specifies the Egress Priority to

be set in case the Ethernet frames carrying

IGMP packets sent over this port need to be

tagged by the control plane. In case the frame

came tagged, priority that came in the tagged

frame will not be changed. The configured

priority will also be used for choice of traffic

class/Queue on outgoing interface whether the

frame is tagged . In case the bridge port is over

an Aggregated ATM VC, this will also be used to

identify the VC, on which the packet is to be

sent. There is an additional support of invalid

value for egress priority in IGMP port info to

indicate that the priority is not to be forced on

egress frame for this port.

Type: Modify -- Optional

Valid values: 0 - 7

maxgrpallowed

<maxgrpallowed-val>

This parameter controls the no. of simultaneous

channels that can be received by this port

Type: Modify -- Optional

Valid values: 0 - 256

querierstatus Enable |

Disable

This parameter controls whether a port can

become querier

Type: Modify -- Optional

mcastvlanstatus

Enable | Disable

This parameter controls the status of Multicast

Vlan option on a port

Type: Modify -- Optional

nomatchaction Drop |

Transparentlyforward |

Learn

This parameter specifies the action to be taken

when multicast vlan can not be determined for a

port where multicast vlan option is enabled

Possible action values will be :Drop,

Transparently forward, and Learn based on

ingress vlan

Type: Modify -- Optional

Example: $ get igmpsnoop port info portid 6

Output

1 2 ... 427 428 429 430 431 432 433 434 435 436 437 ... 602 603

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