Enable and Disable Icmp Messages | Allied Telesis 86251-08 manual

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Patch Release Note

After you have configured the ping polling instance, specify a script or scripts to run when the device becomes unreachable, using the command:

CREATE TRIGGER=trigger-idMODULE=PING EVENT=DEVICEDOWN

POLL=poll-id SCRIPT=filename... [other-options...]

Then specify a script or scripts to run when the device becomes reachable again, using the command:

CREATE TRIGGER=trigger-idMODULE=PING EVENT=DEVICEUP

POLL=poll-id SCRIPT=filename... [other-options...]

where filename is the name of the script file, and will have a .scp extension.

Finally, enable the polling instance, using the command:

ENABLE PING POLL=poll-id

Ping polling is only available for IP and IPv6 (ICMP and ICMP6 Echo Request and

Reply packets), not for IPX, AppleTalk or OSI.

Enable and Disable ICMP Messages

The Internet Control Message Protocol (ICMP) allows routers to send error and control messages to other routers or hosts. It provides the communication between IP software on one system and IP software on another.

This enhancement allows the switch to enable or disable some ICMP messages when directed by the network manager.

The ICMP messages that are able to be enabled or disabled are:

■Network unreachable (RFC792 Type 3 Code 0)

■Host unreachable (RFC792 Type 3 Code 1)

■ICMP redirect messages (RFC792 Type 5 Code 0, 1, 2, 3)

Network Unreachable

This message indicates that the switch does not know how to reach the destination network.

Host Unreachable

This message indicates that the switch does not know how to reach the host.

ICMP Redirect

This message is sent to a local host to tell it that its target is located on the same LAN (no routing is required) or when it detects a host using a non-optimal route (usually because a link has failed or changed its status) on a directly connected router to advise of a better route to a particular destination.

For more information on ICMP, see the IP Chapter in your switch’s Software

Reference manual.

Patch 86251-08 for Software Release 2.5.1 C613-10356-00 REV I

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Allied Telesis 86251-08 manual Enable and Disable Icmp Messages, Icmp Redirect

Contents

Patch For Rapier Series Switches Introduction Features PCR Module IPG LevelPCR 03359 Module Core Level PCR Module BGP Level PCR 03684 Module Core Level PCR Module TTY, User LevelPCR Module STP Level PCR Module FIRE, Utility Level PCR Module Isakmp Level PCR Module Ipsec LevelPCR Module SW56 Level PCR Module Firewall Level PCR Module SWI Level PCR Module IGP LevelPCR 31001 Module Dhcp Level PCR Module Utility Level PCR Module BGP Level PCR 31081 Module VRRP, IP, TCP, Telnet PCR Module File LevelPCR Module FFS Level PCR 31098 Module Dhcp Level PCR 31106 Module MLD Level PCR Module IPX2 LevelPCR 02414 Module IPV6, SWI, IPG, Vlan PCR Module IPG PCR Module OSPF, IPG Level PCR Module ETH, IPG, IPv6, IPX LevelPCR 03751 Module Mlds Level PCR Module FILE, INSTALL, SCR Level PCR Module Install LevelPCR Module ETH Level PCR 03801 Module Mlds Level PCR 03823 Module Vlan Level PCR 03843 Module Dhcp Level PCR Module IPG, IPV6 Level PCR 03870 Module SWI, Vlan LevelPCR Module DHCP, Telnet Level PCR Module TTY Level PCR Module Switch Level PCR Module IP ARP LevelPCR Module Ikmp Level PCR Module Firewall Network affecting No PCR Module Ospf Network affecting No PCR Module L2TP Level PCR Module PRI Level PCR Module PPP LevelPCR 03515 Module Dhcp Level PCR Module BGP, TCP Level PCR Module HTTP, Firewall LevelPCR 03547 Module Dhcp Level PCR Module Http Level PCR Module FIREWALL, IPG Level PCR 03584 Module MLD LevelPCR Module Ping Level PCR 03615 Module Load Level PCR 03618 Module Dhcp LevelPCR Module STP, SWI Level PCR 03647 Module Snmp Level PCR Module PKI Level PCR 03691 Module Dvmrp LevelPCR 03698 Module Dvmrp Level PCR 03708 Module Dhcp Level PCR Module PPP, VJC Level PCR Module IP Level PCR Module Vrrp Level PCR Module Rsvp Level Features PCR 03371 Module Dhcp Level PCR Module IPSEC, Ikmp LevelPCR Module SSL Level PCR 03405 Module Stream Level PCR 03410 Module VLAN, Core LevelPCR 03424 Module Dhcp Level PCR 03429 Module SWI, Vlan Level PCR 03436 Module IP, Dhcp Level PCR Module IPX LevelPCR 03443 Module Dhcp Level PCR Module FR Level PCR 03465 Module Dhcp Level PCR 03492 Module HTTP, Load Level PCR Module BGP, Firewall Level PCR 03515 Module Dhcp Level PCR 02577 Module IPG, LOG Level PCR Module GUI LevelPCR 03089 Module Core Level PCR 03094 Module STP, Vlan Level PCR 03096 Module Vlan Level PCR Module PIM, DVMRP, IPG LevelPCR 03109 Module LOG Level PCR Module Classifier Level PCR Module ETH, IPG Level PCR Module IPG, SWI LevelPCR Module Cure Level PCR Module Port Level PCR 03153 Module ACC Level PCR Module PCI LevelPCR 03167 Module Dvmrp Level PCR Module CORE, FFS, TTY Level PCR Module FIREWALL, LB LevelPCR Module LB Level PCR Module User Level PCR 03205 Module Dhcp Level PCR 03229 Module Load Level PCR 03239 Module QOS Level PCR Module SWI, IPG, PIM LevelPCR 03247 Module MVR Level PCR 03256 Module MLD Level PCR Module VLAN, IPG Level PCR Module DHCP, Q931, Telnet Level PCR 03334 Module MVR Level PCR 03336 Module Core LevelPCR 03346 Module Snmp Level PCR Module IP, SWI Level PCR 03370 Module MVR Level Vlan PCR 03388 Module Dhcp Level ADD PPP Create PPP Delete PPP SET PPP Show PPP PCR 03067 Module Dhcp Level PCR 03068 Module SWI, QOS LevelPCR 03077 Module Core Level PCR Module IPV6 Network affecting No PCR Module SWI Network affecting No PCR Module IPG Network affecting NoPCR Module PCI Network affecting No PCR Module IPG, ETH Network affecting No Availability Icmp Router Discovery Advertisements PCR Module TELNET, PING, IPV6, Network affecting NoPCR Module TCP Network affecting No PCR Module TM Network affecting No Router Advertisement Messages To change these settings, use one of the commands ADD IP Interface SET IP Interface Enable IP Advertise Disable IP AdvertiseADD IP Advertise Interface Delete IP Advertise Interface SET IP Advertise Interface Example output from the Show IP Advertise command Show IP Advertise Same subnet Adopting the Vrrp IP Address MLD Snooping Ping Polling of Device Reachability Down device unreachable Enable and Disable Icmp Messages Icmp Redirect Commands Disable IP Icmpreply Static Igmp Show IP Icmpreply Configuration Example Commands Show IP Igmp See Also Show IP Igmp Debug ADD IP Igmp Destination Create IP Igmp Destination Delete IP Igmp Destination Destroy IP Igmp Destination Disable IP Igmp Debug Enable IP Igmp Debug Checking the Port Map on Rapier16fi Switches Show IP Igmp Debug How to check that the port map is correct How to restore the correct port map PPPoE Client on Vlan Interfaces Force Eprom download Y ? ADD PPP Create PPP Delete PPP SET PPP VLANn-servicename, TNL- callname Show PPP Show PPP