Table of Contents
Advertisement
Copyright © 2010, Juniper Networks, Inc.
SYNs acked—Number of SYNs received and then acknowledged by the TCP stack.
NOTE: This count is maintained even when the protection functions
are disabled. The value indicates the count of packets that would have
been acknowledged if the protections were enabled. Providing this
information can help determine whether attacks are occurring.
Bogus SYNs—Number of RSTs that were judged to be invalid (that is, their timer
expired) and therefore ignored
Data Insertions rejected—Number of packets received and dropped because they
are believed to have been inserted by an attacker
NOTE: This count is maintained even when the protection functions
are disabled. The value indicates the count of packets that would have
been rejected if the protections were enabled. Providing this
information can help determine whether attacks are occurring.
PMTUD information—Information regarding path MTU discovery
PMTUD—Status of path MTU discovery on the virtual router: enabled or disabled
Administrative Minimum MTU—Minimum MTU that is enabled on any connection;
a value of " none" indicates that the minimum is zero (0)
Administrative Maximum MTU—Maximum MTU that is enabled on any connection;
a value of " none" indicates that the maximum is 65535
Timer 1—Amount of time the virtual router waits after receiving an ICMP Too Big
message before attempting to increase the path MTU
Timer 2—Amount of time the virtual router waits after successfully increasing the
MTU before attempting to increase it more
# 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
Chapter 2: Configuring IPv6
183
Advertisement
Table of Contents
