Allied Telesis C613-16164-00 REV E manual VRF communication plan

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Configuring a complex inter-VRF solution

VRF communication plan

VRF shared can access all VRFs red, green, blue and orange (excluding VRF overlap).

VRFs red, green, blue, and orange are only able to access VRF shared. They cannot access each other in this example.

VRF overlap remains completely isolated from all other VRFs, and it has a connected route to subnet 192.168.10.0/24, which is also configured in VRF red. No routes are exported from or imported to VRF overlap, ensuring there is no IP address range overlap conflict when performing inter-VRF communication.

VRF red can access the Internet, and VRF shared subnets, 192.168.100.0/24, 192.168.43.0/ 24, but VRF red cannot access VRF shared subnets 192.168.44.0/24, 192.168.45.0/24.

VRF red has a connected route to subnet 192.168.10.0/24, which is also configured in VRF overlap. This connected route in VRF red is leaked to other VRFs.

VRF green can access the Internet, and VRF shared subnets, 192.168.100.0/24, 192.168.44.0/24, but VRF green cannot access VRF shared subnets 192.168.43.0/24, 192.168.45.0/24.

VRF green has a connected route to subnet 192.168.20.0/24, which overlaps a static route configured in VRF orange. This connected route in VRF green is leaked to other VRFs.

VRF blue can access the Internet, and VRF shared subnets, 192.168.100.0/24, 192.168.45.0/24, but VRF blue cannot access VRF shared subnets 192.168.43.0/24, 192.168.44.0/24.

VRF orange can access the Internet, and can also access all VRF shared subnets, 192.168.100.0/24, 192.168.43.0/24,192.168.44.0/24, 192.168.45.0/24.

VRF orange has static route to subnet 192.168.20.0/24, which overlaps a connected route configured in VRF green. Therefore this subnet is not leaked from VRF orange to other VRF instances, ensuring there is no IP address range overlap conflict when performing inter-VRF communication.

Configure VRF-lite Page 45

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Contents What is VRF-lite? How To Configure VRF-lite IntroductionCommand summary Software feature licensesWho should read this document? Which products and software version does it apply to?Contents VRF GlossaryUnderstanding VRF-lite Route table and interface management with VRF-lite VRF-lite security domainsInterface management with VRF Vlan5Adding a VRF-aware static ARP Route management with VRFInter-VRF communication Static and dynamic inter-VRF routing For example VRF-lite features in AW+Route limiting per VRF instance VRF aware services includeVRF-aware utilities within AW+  Ping Telnet client  SSH client TCP dump Awplusconfig# access-list standard Configuring VRF-liteAwplusconfig-if#switchportaccess vlanx Family Awplusconfig-route-map#match ip Ip route 192.168.50.0/24 Ip route vrf green 192.168.1.0/24 Static inter-VRF routingForwarding Information Base FIB and routing protocols Dynamic inter-VRF communication explainedBGP Inter-VRF communication via BGP Route-target import ASNVRFinstance For example Using the route-target commandRoute-target both ASNVRFinstance For example Can be replaced withIf VRF red initially includes Also, if VRF shared configuration includesIf VRF shared initially includes Via BGP IVR, VRF shared will end up with the routesThen via BGP IVR, VRF red will end up with the routes If VRF shared configuration includesViewing source VRF and attribute information for a prefix How VRF-lite security is maintainedMultiple VRFs without inter-VRF communication Simple VRF-lite configuration examples26 Configure VRF-lite Vlan 28 Configure VRF-lite Configure VRF-lite 30 Configure VRF-lite Configure VRF-lite 32 Configure VRF-lite Inter-VRF configuration examples with Internet access Configuration Configure VRF-lite Example B Configuration 38 Configure VRF-lite Configure VRF-lite Example C Configuration 42 Configure VRF-lite Configure VRF-lite Configuring a complex inter-VRF solution Network description Each VLANs is associated with a VRF instance VRF communication plan Configuration breakdown Configure VRF-lite Configure Vrfs Configure the hardware ACLs This example, three access groups are attached to port Within the same IP subnet that the switch port is a member192.168.43.0/24 via the shared VRF Configure Vlan Database Configure IP Addresses Configure VRF-lite Configure Dynamic Routing Configure VRF-lite 56 Configure VRF-lite Configure Static Routing Complete show run output from VRF device is below Configure VRF-lite 60 Configure VRF-lite Configure VRF-lite IP route table from VRF device is below VRF blue Hostname Internetrouter Hostname sharedrouter N1 Ospf Nssa Hostname redospfpeerHostname greeniBGPpeer Hostname bluerippeer Hostname orangerouter Hostname orangeospfpeer VCStack and VRF-lite Other features used in this configurationStack provisioning GreyVirtual Chassis ID X610 VCStack configurationX900 configuration 74 Configure VRF-lite Communication plan Sharing VRF routing and double tagging on the same portGreen PortConfigurations X610 aX610 B Configure VRF-lite Additional notes BGP configuration tips 80 Configure VRF-lite VRF device Red router vlan database Red router Route Limits Configuring static route limitsConfiguring Dynamic route limits Allowed number of fib routes excluding Connect and Static100 Syntax No max-fib-routesVRF-lite usage guidelines Useful VRF-related diagnostics command list GeneralRouting general Routing protocols IP prefix network, e.g TCPdump HW platform table commands

C613-16164-00 REV E specifications

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