Enabling Replying To Multicast Echo Requests; Enabling Sending Icmpv6 Destination Unreachable Messages - HP FlexNetwork MSR2003 Configuration Manual

Step
1. Enter system view.
2. Set the bucket size and the
interval for tokens to arrive in
the bucket for ICMPv6 error
messages.

Enabling replying to multicast echo requests

The device does not respond to multicast echo requests by default. In some scenarios, you must
enable the device to answer multicast echo requests so the source host can obtain needed
information.
To enable the device to answer multicast echo requests:
Step
1. Enter system view.
2. Enable replying to multicast
echo requests.
Enabling sending ICMPv6 destination unreachable
messages
The device sends the source the following ICMPv6 destination unreachable messages:
•
ICMPv6 No Route to Destination message—A packet to be forwarded does not match any
route.
•
ICMPv6 Communication with Destination Administratively Prohibited message—An
administrative prohibition is preventing successful communication with the destination. This is
typically caused by a firewall or an ACL on the device.
•
ICMPv6 Beyond Scope of Source Address message—The destination is beyond the scope
of the source IPv6 address. For example, a packet's source IPv6 address is a link-local address,
and its destination IPv6 address is a global unicast address.
•
ICMPv6 Address Unreachable message—The device fails to resolve the link layer address
for the destination IPv6 address of a packet.
•
ICMPv6 Port Unreachable message—No port process on the destination device exists for a
received UDP packet.
If a device is generating ICMPv6 destination unreachable messages incorrectly, disable the sending
of ICMPv6 destination unreachable messages to prevent attack risks.
To enable sending ICMPv6 destination unreachable messages:
Step
1. Enter system view.
2. Enable sending ICMPv6 destination
unreachable messages.
Command
system-view
ipv6 icmpv6 error-interval
milliseconds [ bucketsize ]
Command
system-view
ipv6 icmpv6
multicast-echo-reply enable
Command
system-view
ipv6 unreachables enable
224
Remarks
N/A
By default, the bucket allows a
maximum of 10 tokens. A token is
placed in the bucket at an interval of
100 milliseconds.
To disable the ICMPv6 rate limit, set
the interval to 0 milliseconds.
Remarks
N/A
By default, this function is
disabled.
Remarks
N/A
By default, this function is
disabled.