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EX2500 Ethernet Switch Configuration Guide
72 FastLeave
The client-server path is set up as follows:
1. An IP Multicast router (Mrouter) sends Membership Queries to the switch, which
forwards them to all ports in a given VLAN.
2. Hosts that want to receive the multicast data stream send Membership Reports
to the switch, which sends a proxy Membership Report to the Mrouter.
3. The switch sets up a path between the Mrouter and the host, and blocks all
other ports from receiving the multicast.
4. Periodically, the Mrouter sends Membership Queries to ensure that the host
wants to continue receiving the multicast. If a host fails to respond with a
Membership Report, the Mrouter stops sending the multicast to that path.
5. The host can send a Leave Report to the switch, which sends a proxy Leave
Report to the Mrouter. The multicast path is terminated immediately.
The EX2500 switch supports the following IGMP capacities:
IGMP versions 1, 2, and 3
1024 VLANs
128 Mrouters
1024 multicast groups
FastLeave
In normal IGMP operation, when the switch receives an IGMPv2 leave message, it
sends a Group-Specific Query to determine if any other devices in the same group
(and on the same port) are still interested in the specified multicast group traffic.
The switch removes the affiliated port from that particular group, if the following
conditions apply:
If the switch does not receive an IGMP Membership Report within the
query-response-interval.
If no multicast routers have been learned on that port.
With FastLeave enabled on the VLAN, a port can be removed immediately from the
port list of the group entry when the IGMP Leave message is received, unless a
multicast router was learned on the port.
Enable FastLeave only on VLANs that have only one host connected to each
physical port. To enable FastLeave, use the following command:
ex2500(config)# ip igmp fastleave <VLAN number (1-4094)>
NOTE: Unknown multicast traffic is sent to all ports if the flood option is disabled.
To enable or disable IGMP flood, use the following command:
ex2500(config)# [no] ip igmp flood
- Configuration Guide 1
- Table of Contents 3
- Part 2 Appendixes 6
- Part 3 Indexes 6
- List of Figures 7
- List of Tables 10
- About This Guide 11
- Documentation Conventions 12
- Documentation Feedback 13
- Requesting Technical Support 13
- Opening a Case with JTAC 14
- Accessing the Switch 17
- Using Telnet 19
- Using SNMP 21
- SNMPv1, SNMPv2 21
- Default Configuration 22
- User Configuration 22
- Configuring SNMP Trap Hosts 23
- Securing Access to the Switch 24
- Switch User Accounts 27
- TACACS+ Authentication 28
- Secure Shell 31
- End User Access Control 32
- User Access Control 33
- Listing Current Users 34
- Chapter 2 35
- VLAN Numbers 36
- PVID Numbers 36
- VLAN Tagging 37
- 24 VLAN Tagging 38
- VLAN Tagging 25 39
- Chapter 2: VLANs 39
- VLAN Configuration Rules 40
- Component Description 41
- Private VLANs 43
- Private VLAN Ports 43
- Spanning Tree Protocol 45
- Bridge Priority 46
- Port Priority 47
- Port Path Cost 47
- Creating a VLAN 48
- Rules for VLAN Tagged Ports 48
- Rapid Spanning Tree Protocol 49
- Port State Changes 49
- Port Type and Link Type 50
- RSTP Configuration Guidelines 50
- RSTP Configuration Example 50
- Per VLAN Rapid Spanning Tree 51
- Configuring PVRST 52
- MSTP Region 53
- Common Internal Spanning Tree 53
- MSTP Configuration Guidelines 53
- Fast Uplink Convergence 55
- Configuration Guidelines 56
- Ports and Trunking 57
- Built-In Fault Tolerance 58
- TRUNK 3: PORTS 2, 9, AND 16 59
- TRUNK 1: PORTS 1, 11, AND 18 59
- Chapter 4: Ports and Trunking 61
- Actor Switch Partner Switch 1 62
- LACP Configuration Guidelines 63
- Configuring LACP 63
- (3 seconds), instead 64
- Quality of Service 65
- Permit/Deny 66
- MAC Extended ACLs 67
- IP Standard ACLs 67
- IP Extended ACLs 68
- Understanding ACL Priority 69
- Assigning ACLs to a Port 70
- Viewing ACL Statistics 70
- ACL Configuration Examples 70
- Using ACL Filters 57 71
- Chapter 5: Quality of Service 71
- Using ACL Filters 72
- Using Storm Control Filters 73
- Broadcast Storms 73
- Configuring Storm Control 73
- Per Hop Behavior 75
- QoS Levels 76
- DSCP Mapping 76
- Priority 77
- VLAN Identifier (VID) 77
- Queuing and Scheduling 78
- Remote Monitoring 79
- RMON Group 1—Statistics 80
- RMON Group 2—History 81
- History MIB Object ID 81
- Configuring RMON History 81
- RMON Group 3—Alarms 82
- Alarm MIB Objects 82
- Configuring RMON Alarms 82
- RMON Group 9—Events 83
- 70 RMON Group 9—Events 84
- Chapter 7 85
- FastLeave 86
- IGMPv3 Snooping 87
- Static Multicast Router 88
- Detection 89
- Failure Detection Pair 90
- UFD Configuration Guidelines 90
- UFD Configuration Example 91
- Monitoring UFD 91
- 78 Monitoring UFD 92
- Appendixes 93
- 80 Appendixes 94
- Appendix A 95
- Configuring Port Mirroring 96
- Index on page 85 97
- 84 Indexes 98
- Index 85 99
- 86 Index 100
- Index 87 101
- 88 Index 102
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