Protocols And Standards; Configuration Procedure - HP FlexNetwork MSR2003 Configuration Manual

Advertising interval
A router interface with IRDP enabled sends out RAs at a random interval between the minimum and
maximum advertising intervals. This mechanism prevents the local link from being overloaded by a
large number of RAs sent simultaneously from routers.
As a best practice, shorten the advertising interval on a link that suffers high packet loss rates.
Destination address of RAs
An RA uses either of the following destination IP addresses:
•
Broadcast address 255.255.255.255.
•
Multicast address 224.0.0.1, which identifies all hosts on the local link.
By default, the destination IP address of an RA is the broadcast address. If all listening hosts in a
local area network support IP multicast, specify 224.0.0.1 as the destination IP address.
Proxy-advertised IP addresses
By default, an interface advertises its primary and secondary IP addresses. You can specify IP
addresses of other gateways for an interface to proxy-advertise.

Protocols and standards

RFC 1256: ICMP Router Discovery Messages

Configuration procedure

To configure IRDP:
Step
1. Enter system view.
2. Enter interface view.
3. Enable IRDP on the interface.
4. (Optional.) Specify the
preference of advertised
primary and secondary IP
addresses on the interface.
5. (Optional.) Set the lifetime of IP
addresses to be advertised.
6. (Optional.) Set the maximum
and minimum advertising
intervals.
7. (Optional.) Specify the
Command
system-view
interface interface-type
interface-number
ip irdp
ip irdp preference
preference-value
ip irdp lifetime lifetime-value
ip irdp interval
max-interval-value
[ min-interval-value ]
ip irdp multicast
183
Remarks
N/A
The interface can be a Layer 3
Ethernet interface or VLAN
interface.
By default, IRDP is disabled.
After IRDP is enabled on an
interface, the IRDP configuration
takes effect, and the device sends
RA messages out of the interface.
The default preference is 0.
The default lifetime is 1800 seconds.
The lifetime applies to all advertised
IP addresses, including
proxy-advertised IP addresses on
the interface.
The lifetime cannot be shorter than
the maximum advertising interval.
By default, the maximum interval is
600 seconds, and the minimum
interval is 3/4 of the maximum
interval.
By default, RAs use the broadcast