Specifications

About the Network Domain Feature
8-2 Configuring Network Domains
Figure 8-1 Network Domain
InaNetworkDomain,oneormoreRoamAboutSwitchactsasaseeddevice.ANetworkDomain
seedstoresinformationaboutalloftheVLANsontheNetworkDomainmembers.TheNetwork
Domainseedssharethisinformationamongthemselves,sothateveryseedhas anidentical
database.Intheexample
above,oneRoamAboutSwitchateachsiteisaNetworkDomainseed.
EachNetworkDomainmembermaintainsaTCPconnectiontooneoftheseeds.WhenaNetwork
DomainmemberneedsinformationaboutaVLANinaremoteMobilityDomain,itconsultsthe
NetworkDomainseedtowhichitisconnected.
Iftheseedhasinformationabouttheremote
VLAN,itrespondswiththeIPaddressofaRoamAboutSwitchwheretheVLANexists.AVLAN
tunnelisthencreatedbetweentheRoamAboutSwitchandtheremoteRoamAboutSwitch.
Figure 8‐2illustrateshowuserBob,whoisbasedatSalesOfficeC
getsconnectivityandisplaced
inaVLANwhenhevisitstheCorporateOffice.
WAN Link
Corporate Office
ND Seed
Peer
Layer 2-3
RBT-Switch
RBT-Switch
RBT-Switch
Branch Office 1
ND Seed
Peer
Layer 2-3
RBT-Switch RBT-Switch
Branch Office 2
Layer 2-3
RBT-Switch RBT-Switch
Sales Office B
ND Seed
Peer
RBT-Switch
Sales Office C
ND Seed
Peer
RBT-Switch
Sales Office A
ND Seed
Peer
RBT-Switch
ND Seed
Peer