Planet MGSW-24160F User Manual

User’s Manual of MGSW-24160F
159
IGMP Versions 1 and 2
Multicast groups allow members to join or leave at any time. IGMP provides the method for members and multicast routers to
communicate when joining or leaving a multicast group.
IGMP version 1 is defined in RFC 1112. It has a fixed packet size and no optional data.
The format of an IGMP packet is shown below:
IGMP Message Format
Octets
0 8 16 31
Type Response Time
Checksum
Group Address (all zeros if this is a query)
The IGMP Type codes are shown below:
Type Meaning
0x11
Membership Query (if Group Address is 0.0.0.0)
0x11
Specific Group Membership Query (if Group Address is
Present)
0x16 Membership Report (version 2)
0x17 Leave a Group (version 2)
0x12 Membership Report (version 1)
IGMP packets enable multicast routers to keep track of the membership of multicast groups, on their respective sub networks.
The following outlines what is communicated between a multicast router and a multicast group member using IGMP.
A host sends an IGMP “report” to join a group
A host will never send a report when it wants to leave a group (for version 1).
A host will send a “leave” report when it wants to leave a group (for version 2).
Multicast routers send IGMP queries (to the all-hosts group address: 224.0.0.1) periodically to see whether any group members
exist on their sub networks. If there is no response from a particular group, the router assumes that there are no group members
on the network.
The Time-to-Live (TTL) field of query messages is set to 1 so that the queries will not be forwarded to other sub networks.
IGMP version 2 introduces some enhancements such as a method to elect a multicast queried for each LAN, an explicit leave

Planet MGSW-24160F Specifications

General

Console port	RS-232
Compatible memory cards	Not supported
SFP module slots quantity	16
Installed SFP modules quantity	0
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity	8
10G support	No
Networking standards	IEEE 802.1D, IEEE 802.1Q, IEEE 802.1ab, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z
Virtual LAN features	Private VLAN, Protocol-based VLAN, Port-based VLAN
Copper ethernet cabling technology	10BASE-T, 100BASE-FX, 100BASE-TX, 100BASE-T, 1000BASE-T, 1000BASE-TX
MAC address auto-learning supported	Yes
Throughput	35.6 Mpps
Jumbo frames	10000
MAC address table	16000 entries
Form factor	1U
Product color	Blue
Number of fans	2 fan(s)
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (max)	38 W
Number of multicast groups filtered	255
Switch type	Managed
Switch layer	L2+
DHCP features	DHCP server, DHCP client
Security algorithms	SNMP, SSH, SSL/TLS
Storage temperature (T-T)	-10 - 70 °C
Operating temperature (T-T)	0 - 60 °C
Operating relative humidity (H-H)	5 - 95 %
Transmission distance (max)	120 km
Fiber ethernet cabling technology	1000BASE-X
Harmonized System (HS) code	85176990

Weight and Dimensions

Depth	200 mm
Width	440 mm
Height	44.5 mm
Weight	3000 g