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32 Cards in this Set
- Front
- Back
IGMP
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Internet Group management protocol
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What is IGMP?
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Host to router protocol that allows hosts to request a join to the multicast group
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IGMP Version 1
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hosts drop off silently, inefficient
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IGMP Version 2
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Like Version 1, but with LEAVE GROUP message
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IGMP Version 3
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Makes source specific Multicast possible
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IGMP Version 2 host messages (3)
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Membership Report
Version 1 Membership Report Leave Group |
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IGMP Version 2 membership report
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sent when a host wants to join the group or in response to a Membership Query
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IGMP Version 2 two types of queries used by routers
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General Query
Group-Specific Query |
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IGMP Version 2 General Query
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Any multicast capable groups and members
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IGMP Version 2 Group-specific query
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specific multicast group
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true or false, IGMP Version 2 is backwards compatible with Version 1
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True
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In the membership report, the destination address is the ______ address
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group
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IGMP version 2 features a ______Query
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group-specific
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New messages added to IGMP Version 3
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Group-and-source-specific query
other messages modified to include request for a specific source |
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IGMP Version 3 creates a _______ relationship for a multicast app out what may have been a MANY to MANY model
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ONE to MANY
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IGMP Version 3 members can express...
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INCLUDE and EXCLUDE filter requests
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What is the default IGMP version on cisco routers?
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Version 2
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destination IP address used in an IGMP Leave Group Message
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224.0.0.2
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messages sent by a route running ICMP Version 2
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Group-specific Query
General Query |
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destination IP address used in an IGMP General Query
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224.0.0.1
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router response after receiving an ICMP leave group message?
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Group-specific query
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router that is responsible for sending IGMP queries on LAN segment
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router with lowest IP address
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when DR receives (S,G) join request with the G address in SSM address range, it.....
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must initiate a (S,G) join
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new IGMP query created for IGMPv3
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Group and source specific query
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destination address used in an IGMPv3 membership report message
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224.0.0.22
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number of bits anycast RP address should use
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32
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in the event of Anycast RP failure
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IGP converges and another RP becomes activve for more devices in the area
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the ip pim autorp listener command causes 224.0.1.39 and 40 to operate in which mode
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dense
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default sparse mode keepalive interval (join messages)
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60 seconds
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the sparse mode join message lists
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all route entries for which the destination router is the previous hop router
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the ip pim message-interval can change..
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the default 60 second interval
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IGMP version 3 removed the membership report suppression feature from 1 and 2 because...
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-default holdtime is 4 minutes for sparse mode join messages
-a single membership report now bundles multicast group messages -to simplify message processing for hosts |