Routing:
[Gen][CCNA][CCNP Route][CCNP Remote][CCDA][MPLS][EEM][Add][Juniper][ACL][Host]
Switching: [CCNP Switch] [Switch Add] [Intro] [VLANs] [MLS] [STP] [QoS] [Availability] Security: [CCNP Security] [CCNA Security] [CCNP ISCW][PIX] [Adv PIX/ASA] [Net Sec1] [Net Sec2] Wireless: [Wireless] [Wireless Chall] [CCNA Wireless] [Wireless Theory] Voice: [Voice/QoS] [CCNA Voice] [CCVP Gateway] [CCVP Voice] Topics: [Dot1q][Dot1x][BGP][BRI][DHCP][IGRP][IGMP][OSPF][PPP][QoS][RADIUS][RIP][Subnet][SNMP][VLAN] IGMP (Internet Group Management Protocol)With multicast network we have group communcation, and where a single address is used for a one-to-many or a many-to-many distribution. This is useful in areas of voice broadcasts, IPTV, and video conferencing. With this a Layer 2 swith can broadcast multicast information to the hosts and devices they connect to. Many multicast addresses use the 224.0.0.0/24 address range, and these addresses are non-routable (and are thus not forwarded by a router). This is part of the Class D address range of 224.0.0.0-239.255.255.255, of which 224.000.000.000-239.255.255.255 are reserved for multicast communications. IGMP dynamically registers hosts within a defined in a multicast group for a given network. CCNP Switch
PIX/ASA
TheoryWith multicast network we have group communcation, and where a single address is used for a one-to-many or a many-to-many distribution. This is useful in areas of voice broadcasts, IPTV, and video conferencing. With this a Layer 2 swith can broadcast multicast information to the hosts and devices they connect to. Many multicast addresses use the 224.0.0.0/24 address range, and these addresses are non-routable (and are thus not forwarded by a router). This is part of the Class D address range of 224.0.0.0-239.255.255.255, of which 224.000.000.000-239.255.255.255 are reserved for multicast communications. IGMP dynamically registers hosts within a defined in a multicast group for a given network. The commands used are: # config t (config)# int fa0/1 (config-if)# no switchport (config-if)# ip igmp join-group 224.0.0.1 (config-if)# ip igmp querier-timeout 10 (config-if)# ip igmp query-interval 10 (config-if)# ip igmp query-max-response-time 10 (config-if)# ip igmp version 2 Notes # config t (config)# int fa0/1 (config-if)# no switchport (config-if)# ip igmp ? access-group IGMP group access group helper-address IGMP helper address immediate-leave Leave groups immediately without sending last member query, use for one host network only join-group IGMP join multicast group last-member-query-interval IGMP last member query interval querier-timeout IGMP previous querier timeout query-interval IGMP host query interval query-max-response-time IGMP max query response value static-group IGMP static multicast group tcn IGMP TCN configuration unidirectional-link IGMP unidirectional link multicast routing v3lite Enable/Disable IGMPv3 Lite version IGMP version (config-if)# ip igmp jo ? A.B.C.D IP group address (config-if)# ip igmp jo 224.0.0.1 (config-if)# ip igmp querier- ? 60-300 timeout value in seconds (config-if)# ip igmp querier- 10 (config-if)# ip igmp query-m ? 1-25 query response value in seconds (config-if)# ip igmp query-m 10 (config-if)# ip igmp ve ? 1-3 version number (config-if)# ip igmp ve 2 |