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2. Enter interface view.
interface interface-type interface-number
3. Set the lifetime of advertised IP addresses.
ip irdp lifetime lifetime-value
The default lifetime is 1800 seconds.
The lifetime cannot be shorter than the maximum advertising interval.
Setting the advertising intervals
About setting the advertising intervals
A router interface with IRDP enabled sends out RAs randomly 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.
Procedure
1. Enter system view.
system-view
2. Enter interface view.
interface interface-type interface-number
3. Set the maximum and minimum advertising intervals.
ip irdp interval max-interval [ min-interval ]
By default, the maximum interval is 600 seconds, and the minimum interval is 3/4 of the
maximum interval.
Specifying the multicast address as the
destination address for RAs
About specifying the multicast address as the destination address for 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.
Procedure
1. Enter system view.
system-view
2. Enter interface view.
interface interface-type interface-number
3. Specify the multicast address 224.0.0.1 as the destination IP address of RAs.
ip irdp multicast
By default, RAs use the broadcast address 255.255.255.255 as the destination IP address.
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