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JunosE 11.3.x IP, IPv6, and IGP Configuration Guide
112
# ICMP TooBigs—Number of ICMP Too Big messages that the router has received.
When PMTU is disabled, this counter does not increase.
# ICMP TooBigs for unk. connection—Number of ICMP Too Big messages that the
router has received for TCP connections that do not exist. When PMTU is disabled,
this counter does not increase.
PMTU Increase Attempts—Number of attempts the router has made to increase
the PMTU
Black Hole Detect Threshold—Number of successive transmissions that must
occur on a connection before that connection treats retransmissions as indications
that something is wrong
Override MSS—MSS that is advertised to peers, overriding the MSS that is derived
from the interface MTU. This line does not appear in the output if you do not set
the value.
MTU/MSS information—Information regarding path MTU/MSS
PMTU—Status of MTU/MSS on this virtual router: enabled or disabled
MSS in effect—MSS currently being used for transmission to the peer. This number
changes while various network events occur to cause the router to increase or
decrease its estimate of the MSS.
Calculated MSS to peer—MSS that path MTU discovery has calculated (if PMTUD
is enabled) to the peer
MSS received from peer—MSS that the peer received in a TCP MSS option. If no
option is received, the value is zero (0).
Application set MSS—MSS that an application might have set for the connection
Xmit Interface MSS—MSS for the interface used to transmit packets to the peer;
calculated as the interface MTU minus the size of the TCP and IP headers.
MSS Sent to Peer—MSS that has been advertised to the peer
"ICMP DestUn, Frag Req'd and DF Set" messages—Number of ICMP "Destination
Unreachable: Fragmentation Required and DF set" messages that the router has
received
Number of attempts to increase PMTU—Number of times the router has attempted
to increase the PMTU by probing with a packet that is larger than the known MTU
Time to next increase attempt—Amount of time, in seconds, until the router retries
to increase the MTU
Black Hole Detection State—State of the black hole detection mechanism: none,
detecting, probable, or unknown
Out-of-Order Packet Queue Information—Information regarding packet queue buffers
Copyright © 2010, Juniper Networks, Inc.
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