Layer 3 ingress and egress traffic. You may specify traffic using standard or extended access-lists. This mechanism
copies all incoming or outgoing packets on one port and forwards (mirrors) them to another port. The source port
is the monitored port (MD) and the destination port is the monitoring port (MG).
deny icmp (for Extended IPv6 ACLs)
Configure a filter to drop all or specific ICMP messages.
NOTE:
Only the options that have been newly introduced in Release 9.3(0.0) and Release 9.4(0.0) are described here. For a
complete description on all of the keywords and variables that are available with this command, refer the topic of this command
discussed earlier in this guide.
Syntax
deny icmp {
source address mask
| any | host
ipv6-address
} {
destination address
| any | host
ipv6-address
} [
type
] [
message-type
] [count [byte]] | [log
[interval
minutes
] [threshold-in-msgs [
count
]] [monitor]
To remove this filter, you have two choices:
•
Use the
no seq sequence-number
command syntax if you know the filter’s sequence number
•
Use the
no deny icmp {
source address mask
| any | host
ipv6-address
}
{
destination address
| any | host
ipv6-address
}
command
Parameters
source address
mask
Enter a network mask in /prefix format (/x) or A.B.C.D. The mask, when specified in
A.B.C.D format, may be either contiguous or non-contiguous.
any
Enter the keyword
any
to specify that all routes are subject to the filter.
host
ip-v6address
Enter the keyword
host
then the IPv6 address to specify a host IP address.
destination
Enter the IP address of the network or host to which the packets are sent.
type
Enter the ICMP packet type. The following types are available:
For IPv4:
echo count
echo-reply count
host-unreachable count
host-unknown count
network-unknown count
net-unreachable count
packet-too-big count
parameter-problem count
port-unreachable count
source-quench count
time-exceeded count
For IPv6:
echo count
echo-reply count
nd-ns count
nd-na count
packet-too-big count
parameter-problem count
time-exceeded count
port-unreachable count
Access Control Lists (ACL)
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