This chapter describes Internet Control Message Protocol (ICMP) messages. For information on message content and how to use the message, refer to the Introduction.
| ICMP.001 |
Level: UE-ERROR
Short Syntax: ICMP.001 bd cks 0x received_checksum (exp 0x good_checksum) source_IP_address -> destination_IP_address
Long Syntax: ICMP.001 bad ICMP checksum 0x received_checksum received (expected 0x good_checksum) in packet from source_IP_address to destination_IP_address
Description: A bad ICMP checksum was detected in an incoming ICMP message. The received checksum is displayed, together with the value that the checkum should have had. The received packet is discarded.
Cause: This is probably caused by an error in the source host.
Action: Contact the manufacturer of the source host and report the problem.
| ICMP.002 |
Level: C-INFO
Short Syntax: ICMP.002 ech source_IP_address -> destination_IP_address
Long Syntax: ICMP.002 echo request packet received from source_IP_address to destination_IP_address
Description: An ICMP Echo Request was received from the source host by the router.
| ICMP.003 |
Level: U-INFO
Short Syntax: ICMP.003 ech rp source_IP_address -> destination_IP_address
Long Syntax: ICMP.003 echo reply packet received from source_IP_address to destination_IP_address
Description: An ICMP Echo Reply was received from the source host by the router. This is a slightly suspicious event, since the router does not normally send ICMP Echo Requests.
| ICMP.004 |
Level: CI-ERROR
Short Syntax: ICMP.004 unhnd typ ICMP_type ICMP_code source_IP_address -> destination_IP_address
Long Syntax: ICMP.004 unhandled message type ICMP_type ICMP_code from source_IP_address to destination_IP_address
Description: An ICMP message came in with a type that the router software does not handle.
| ICMP.005 |
Level: U-TRACE
Short Syntax: ICMP.005 unhnd brd typ ICMP_type ICMP_code source_IP_address -> destination_IP_address
Long Syntax: ICMP.005 unhandled broadcast message type ICMP_type ICMP_code from source_IP_address to destination_IP_address
Description: A broadcast ICMP message came in with a type that the router software does not handle.
| ICMP.006 |
Level: UE-ERROR
Short Syntax: ICMP.006 bd typ ICMP_type ICMP_code source_IP_address -> destination_IP_address
Long Syntax: ICMP.006 bad message type ICMP_type ICMP_code from source_IP_address to destination_IP_address
Description: An ICMP message came in with a type that is not legal.
| ICMP.007 |
Level: C-INFO
Short Syntax: ICMP.007 addr msk source_IP_address -> destination_IP_address
Long Syntax: ICMP.007 address mask request received from source_IP_address to destination_IP_address
Description: An ICMP Address Mask Request was received from the source host by the router.
| ICMP.008 |
Level: C-TRACE
Short Syntax: ICMP.008 addr msk rep source_IP_address -> destination_IP_address
Long Syntax: ICMP.008 addres mask reply received from source_IP_address to destination_IP_address
Description: An ICMP Address Mask Reply was received from the source host by the router.
| ICMP.009 |
Level: UI-ERROR
Short Syntax: ICMP.009 no pkt or mem
Long Syntax: ICMP.009 heap memory or packet buffer not available
Description: Internal resources in the router necessary to reply to the incoming message were unavailable.
Cause: Temporarily heavy traffic, or not enough memory for configuration.
Action: If this message occurs persistently and with other messages that indicate the router is out of memory or buffers, the router may not have enough memory to support this configuration. Display the memory statistics in the gateway console to check the status of heap memory and global buffers. Add more memory, or disable unnecessary forwarders, protocols and networks to reduce demand for memory.
| ICMP.010 |
Level: UE-ERROR
Short Syntax: ICMP.010 amb addr msk source_IP_address -> destination_IP_address
Long Syntax: ICMP.010 ambiguous address mask request received from source_IP_address to destination_IP_address
Description: An incoming address mask request on an interface which contained more than one IP source address contained a destination address which could not be localized to one of the addresses, so no reply could be generated.
| ICMP.011 |
Level: UI-ERROR
Short Syntax: ICMP.011 err code sndng pkt to nt network ID
Long Syntax: ICMP.011 error code sending packet to net network ID
Description: An outgoing reply packet was dropped as the result of some problem in the router.
Cause: There are many potential causes of this problem; an overloaded output queue, a down network, etc.
Action: Consult logging output from the relevant network subsystem for more information.
| ICMP.012 |
Level: C-INFO
Short Syntax: ICMP.012 rdr source_IP_address -> destination_IP_address to new_next_hop_IP_address
Long Syntax: ICMP.012 sending redirect for packet from source_IP_address to destination_IP_address to use router new_next_hop_IP_address
Description: The router is sending an ICMP Redirect, advising a source host on a directly connected network that there is a better first hop router for this traffic.
| ICMP.013 |
Level: U-INFO
Short Syntax: ICMP.013 bd prm off problem_offset source_IP_address -> destination_IP_address
Long Syntax: ICMP.013 sending parameter problem message problem offset problem_offset for packet from source_IP_address to destination_IP_address
Description: The router is sending an ICMP Parameter Problem message, for an unspecified problem at the given offset.
| ICMP.014 |
Level: U-TRACE
Short Syntax: ICMP.014 snd ICMP_type ICMP_code pkt source_IP_address -> destination_IP_address
Long Syntax: ICMP.014 sending packet type ICMP_type code ICMP_code for packet from source_IP_address to destination_IP_address
Description: The router is sending an ICMP packet of the specified type about a packet from the source host to the destination.
| ICMP.015 |
Level: UE-ERROR
Short Syntax: ICMP.015 shrt ICMP hdr header_length src source_ip_address
Long Syntax: ICMP.015 short ICMP packet header_length received in packet from source_ip_address
Description: This message is generated when an ICMP packet's indicated header length is below the minimum possible length for an ICMP packet.
Cause: Most likely, this is a damaged packet. It may be that another node is building an incorrect header.
Action: If the problem persists, examine a line trace to determine where the packet is being damaged.
| ICMP.016 |
Level: U-TRACE
Short Syntax: ICMP.016 current_next_hop rdr dest IP_destination to better_next_hop
Long Syntax: ICMP.016 current_next_hop has redirected traffic for IP_destination to better_next_hop
Description: A redirect has been received, changing the next hop for the given destination. Redirects are only processed when running in host mode.
| ICMP.017 |
Level: UE-ERROR
Short Syntax: ICMP.017 Bad rdr from gateway_address, rsn: reason
Long Syntax: ICMP.017 Redirect received from gateway_address was bad for the reason: reason
Description: A redirect was received from a router, but rejected for the specified reason.
| ICMP.018 |
Level: U-TRACE
Short Syntax: ICMP.018 Router advertisement received from router_address
Long Syntax: ICMP.018 Router advertisement received from router_address
Description: An ICMP Router Advertisement (Gateway Discovery) message has been received from the specified router.
| ICMP.019 |
Level: UE-ERROR
Short Syntax: ICMP.019 Bad router adv from gateway_address, rsn: reason
Long Syntax: ICMP.019 Router advertisement received from gateway_address was bad for the reason: reason
Description: An ICMP Router Advertisement (Gateway Discovery) message has been received from the specified router, but was rejected for the specified reason.
| ICMP.020 |
Level: U-INFO
Short Syntax: ICMP.020 rcvd typ ICMP_type ICMP_code source_IP_address -> destination_IP_address
Long Syntax: ICMP.020 received message type ICMP_type ICMP_code from source_IP_address to destination_IP_address
Description: The router has received an ICMP message of the specified type from the source host.
| ICMP.021 |
Level: C-INFO
Short Syntax: ICMP.021 Dropping ech source_IP_address -> destination_IP_address
Long Syntax: ICMP.021 Dropping echo request packet received from source_IP_address to destination_IP_address
Description: An ICMP Echo Request was received from the source host by the router. The router has been configured to drop the request with no response.