VLAN Advertisement Protocol (VAP)
Page 21-8
VLAN Advertisement Protocol (VAP)
The
VLAN
Advertisement Protocol (
VAP
) is an interswitch protocol that keeps the
VLAN
membership databases stored on switches in sync and enables the auto-discovery of network
nodes.
VAP
is useful when you want all
VLAN
s to communicate over a backbone, but do not
want locally connected devices to receive all backbone traffic.
In order for a switch to participate in
VAP
exchanges,
VAP
must be enabled through a soft-
ware configuration command. The switch does not need to have attached devices that are a
part of all groups and
VLAN
s for which
VAP
information is exchanged; however, all groups
and
VLAN
s must be defined on each switch.
Each switch in a network maintains an AutoTracker database. This database is built by
observing traffic that matches user-configured policies. The
VAP
protocol reads this database
on all switches and then advertises entries in the database to all other switches in the
network.
VAP Exchanges Between Switches
VAP
updates nodes on any new entries in AutoTracker databases every 60 seconds.
VAP
also stores information in its own database. Currently this information is used by
SNMP
-
based network management software. The database contains information on
VLAN
member-
ship; it maps each learned
MAC
address to a group and to any associated
VLAN
s. This data-
base can contain information on up to
40,000 MAC
addresses.
VAP packets sent
between switches.
VAP packets sent
between switches.
Summary of Contents for Omni Switch/Router
Page 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Page 4: ...page iv ...
Page 110: ...WAN Modules Page 3 40 ...
Page 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Page 164: ...Using ZMODEM Page 5 8 ...
Page 186: ...Displaying and Setting the Swap State Page 6 22 ...
Page 202: ...Creating a New File System Page 7 16 ...
Page 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Page 430: ...OmniChannel Page 15 16 ...
Page 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Page 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Page 646: ...Application Example DHCP Policies Page 20 30 ...
Page 660: ...GMAP Page 21 14 ...
Page 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Page 722: ...Application Example 5 Page 24 12 ...
Page 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Page 872: ...The WAN Port Software Menu Page 28 46 ...
Page 960: ...Deleting a PPP Entity Page 30 22 ...
Page 978: ...Displaying Link Status Page 31 18 ...
Page 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Page 1024: ...Backup Services Commands Page 34 14 ...
Page 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Page 1072: ...Configuring a Switch with an MPX Page A 10 ...
Page 1086: ...Page B 14 ...
Page 1100: ...Page I 14 Index ...