What is a /32 mask??
Mikdilly
Member Posts: 309
in CCNA & CCENT
Not sure if this in the scope of the ccna but came across a tech note from cisco that describes the behavior of rip and igrp when sending and receiving updates. It says that one of the checks done before advertising a route is check whether a network has a /32 mask????
When RIP or IGRP send an update, they perform certain checks before they advertise the update. This list shows the sequence of events that occurs before Router 1 sends updates to Router 2.
Is the subnet information part of the same major net as the interface that sources the update?
No: Router 1 summarizes at the major net boundary and advertises the network.
Yes: Does the network have the same subnet mask as the interface that sources the update?
Yes: Router 1 advertises the subnet.
No: Does the network have a /32 mask ?
Yes: If it is RIP, then the network is advertised. If it is IGRP, then Router 1 drops the network.
No: Router 1 drops the network.
http://www.cisco.com/en/US/tech/tk364/technologies_tech_note09186a0080093fd8.shtml#nd
When RIP or IGRP send an update, they perform certain checks before they advertise the update. This list shows the sequence of events that occurs before Router 1 sends updates to Router 2.
Is the subnet information part of the same major net as the interface that sources the update?
No: Router 1 summarizes at the major net boundary and advertises the network.
Yes: Does the network have the same subnet mask as the interface that sources the update?
Yes: Router 1 advertises the subnet.
No: Does the network have a /32 mask ?
Yes: If it is RIP, then the network is advertised. If it is IGRP, then Router 1 drops the network.
No: Router 1 drops the network.
http://www.cisco.com/en/US/tech/tk364/technologies_tech_note09186a0080093fd8.shtml#nd