10 • ICMP
! "#
68
&!4 84,( (
ICMP source quench message back to the sending device. A host may send this messages if packets arrive too
fast to be processed or if there is network congestion. The source quench message is a request to reduce the rate
at which the source is sending traffic. If the DACS receives a source quench, it will wait for acknowledgement
of all outstanding packets before sending more packets to the remote destination. Then it will begin sending
out packets at an increasing rate until the connection is restored to standard operating conditions.
Redirects (icmpInRedirects, icmpOutRedirects)
The number of ICMP redirect messages received/sent. A gateway sends a redirect message to a host if the net-
work gateways find a shorter route to the destination through another gateway.
Echos (icmpInEchos, icmpOutEchos)
The number of ICMP echo request messages received/send. The ICMP echo is used whenever one uses the
diagnostic tool ping. Ping is used to test connectivity with a remote host by sending regular ICMP echo
request packets and then waiting for a reply. Received echos (icmpInEchos) will increment when the DACS is
pinged.
Echo Replys (icmpInReps, icmpOutReps)
The number of ICMP echo reply messages received/sent. An echo reply is a response to an echo request. Send
echos (icmpOutEchos) will increment when the DACS sends an echo reply message in response to a ping.
Time Stamps (icmpInTimestamps, icmpInTimestamps)
The number of ICMP time stamp messages received/sent. Time stamp and time stamp replies were originally
designed into the ICMP facility to allow network clock synchronization. Subsequently, a new protocol—Net-
work time protocol (NTP) has taken over this function. Normally, this number will be zero.
Time Stamp Replys (icmpInTimestampsReps) (icmpOutTimestampsReps)
The number of ICMP timestamp reply messages received/sent. This message is part of a time stamp (see “Time
Stamps (icmpInTimestamps, icmpInTimestamps)”) request. Normally, this number will be zero.
Address Mask Requests (icmpInAddrMasks) (icmpOutAddrMasks)
The number of ICMP address mask request messages received/sent. this message is generally used for diskless
workstations which use this request at boot time to obtain their subnet mask. This number will increase if there
are hosts on the network which broadcast these requests.
Address Mask Replys (icmpInAddrMasksReps) (icmpOutAddrMasksReps)
The number of ICMP address mask reply messages received/sent. Normally, this number will be zero.
Summary of Contents for 3092
Page 18: ...About this guide 16...
Page 22: ...1 Introduction 20 8 4 9...
Page 44: ...5 DS0 Mapping 42 C 4...
Page 48: ...6 Clocking 46...
Page 56: ...7 iDSL Port Configuration 54...
Page 66: ...9 Filter IP 64...
Page 89: ...2 3 87 12 TCP finWait1 6 finWait2 7 closeWait 8 lastAck 9 closing 10 timeWait 11 deleteTCB 12...
Page 90: ...12 TCP 88 2 3...
Page 94: ...13 UDP 92...
Page 100: ...14 RIP Version 2 98 7 2 3...
Page 106: ...15 SNMP 104...
Page 118: ...16 System 116 D 4 1...
Page 148: ...18 T1 E1 Link 146 D...
Page 152: ...19 T1 E1 Assignment 150 68 6...
Page 158: ...21 License 156...
Page 162: ...A RJ 21X Wiring Color Chart 160...