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Anleitung Zusammenfassung
If HOSTUNREACH is specified, all host unreachable message replies are enabled (RFC792 Type 3 Code 1). If REDIRECT is specified, all ICMP redirect message replies are enabled (RFC792 Type 5 Code 0, 1, 2, 3). Example To enable all configurable ICMP messages, use the command: ENABLE IP ICMPREPLY=ALL See Also ENABLE IP ECHOREPLY DISABLE IP ICMPREPLY SHOW IP ICMPREPLY SHOW IP ICMPREPLY Syntax SHOW IP ICMPREPLY Description This command display the status of configurable ICMP messages (Figure Figure 1: Example output from the SHOW IP ICMPREPLY command: SHOW IP ICMP REPLY MESSAGES ICMP REPLY MESSAGES: Network Unreachable ................ disabled Host Unreachable ................... disabled Redirect ........................... enabled Patch 86222-27 for Software Release 2.2.2 C613-10319-00 REV Z Patch Release Note Table 25: Parameters in the output of the SHOW IP ICMPREPLY command. Parameter Meaning ICMP Reply Messages A list of ICMP configurable reply messages and whether they are enabled or disabled. IGMP Snooping All-Group Entry Because IGMP is an IP-based protocol, multicast group membership for VLAN aware devices is on a per-VLAN basis. If at least one port in the VLAN is a member of a multicast group, multicast packets will be flooded onto all ports in the VLAN by default. IGMP snooping enables the switch to forward multicast traffic intelligently on the switch. The switch listens to IGMP membership reports, queries and leaves messages to identify the switch ports that are members of multicast groups. Multicast traffic will only be forwarded to ports identified as members of the specific multicast group. This enhancement allows network managers to prevent specified ports from acting as IGMP all-group ports, and specify which ports are allowed to behave as all-group entry ports, by using the ENABLE IP IGMP ALLGROUP command. For example, consider a video streaming service which has 15 channels. When the switch receives IGMP membership reports destined for the address 239.0.0.2 from an unauthorised user, all 15 channels of multicast data floods to that port, which may affect the service of the network. In order to avoid this, the network manager decides whether or not to allow a particular port to behave as an IGMP all-group port, e.g. port 8. Then, whenever the above IGMP membership report is sent, the switch will not automatically add port 8 as one of the egress ports for any IGMP membership report group, so video streaming will not get forwarded to disabled all-group ports selected by the network manager. Commands This enhancement modifies one command: ¦ SHOW IP IGMP and has two new commands: ¦ ENABLE IP IGMP ALLGROUP ¦ DISABLE IP IGMP ALLGROUP Patch 86222-27 for Software Release 2.2.2 C613-10319-00 REV Z Patch 86222-27 For Rapier Switches SHOW IP IGMP Modified Command SHOW IP IGMP Syntax SHOW IP IGMP [COUNTER] [INTERFACE=interface] Description This command displays information about IGMP, and multicast group membership for each IP interface. This enhancement includes the line “Disabled All-groups ports” on the output of this command, as show in Figure 2 on page 43. Ports that are disabled have a “#” symbol next to the port number. Figure 2: Example output from the SHOW IP IGMP command. IGMP Protocol Status ........................... Enabled Default Query Interval ........... 125 secs Default Timeout Interval ......... 270 secs Disabled All-groups ports ........ 1,5,7 Interface Name .......... vlan2 (DR) IGMP Proxy .............. Off Group List .............. Group. 238.0.1.2 Last Adv. 172.50.2.1 Refresh time 34 secs Ports 3,11,23 Group. 224.1.1.2 Last Adv. 172.50.2.1 Refresh time 130 secs Ports 2,11,23 All Groups Last Adv. 172.50.1.1 Refresh time 45 secs Ports 1#,11,23 Interface Name .......... vlan4 (DR) IGMP Proxy .............. Off Group List .............. No group memberships. Table 26: New parameter in the output of the SHOW IP IGMP command. Parameter Meaning Disabled All-groups ports A list of ports that are prevented from behaving as IGMP all- group ports. Examples To show information about IGMP, use the command: SHOW IP IGMP See Also ENABLE IP IGMP ALLGROUP DISABLE IP IGMP ALLGROUP Patch 86222-27 for Software Release 2.2.2 C613-10319-00 REV Z ENABLE IP IGMP ALLGROUP Patch Release Note New Commands This enhancement request introduces two new commands from enabling/ disabling all-group entries on switch ports. ENABLE IP IGMP ALLGROUP Syntax ENABLE IP IGMP ALLGROUP=[{port-list|ALL}] where: ¦ port-list is a port number, a range of port numbers (specified as n-m), or a comma separated list of port numbers and/or ranges. Port numbers start at 1 ad end at m, where m is the highest numbered Ethernet switch port, including uplink ports. Description This command enables the specified port(s) to behave as a multicast all-group ports. The ALLGROUP parameter specifies the list of ports able to behave as all- group entry ports. If ALL is specified, all ports are able to behave as all-group entry ports. The defa...