Allied Telesis C613-16164-00 REV E manual Bgp

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Dynamic inter-VRF communication explained

Dual role of

BGP

The command redistribute <protocol> can be configured in an OSPF instance, BGP address-family, or RIP address-family. Via this command, routes are imported from the FIB associated with the VRF instance into the dynamic routing protocol table. Any routing protocol (OSPF, BGP, RIP static, connected, etc.) can be redistributed.

For example, if OSPF instance1 is configured on VRF red, and if OSPF 1 contains the command redistribute BGP, then BGP routes will be copied from VRF red FIB to OSPF instance1.

Similarly, if BGP address-family is configured on VRF red, and if the address-family contains the command redistribute OSPF, then OSPF instance1 routes will be copied from the VRF red FIB into the BGP red address-family route table.

The first role that BGP plays in a VRF-lite environment is to facilitate BGP peering to an external router operating within the VRF routing domain via the neighbor x.x.x.x command configured in a BGP address-family.

The second role that BGP plays is to facilitate route leakage between VRF routing domains.

Dynamic routing protocols (RIP and OSPF) do not facilitate route leakage. RIP and OSPF only operate within a VRF routing domain.

Configure VRF-lite Page 19

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Contents What is VRF-lite? How To Configure VRF-lite IntroductionWhich products and software version does it apply to? Software feature licensesCommand summary Who should read this document?Contents VRF GlossaryUnderstanding VRF-lite Vlan5 VRF-lite security domainsRoute table and interface management with VRF-lite Interface management with VRFAdding a VRF-aware static ARP Route management with VRFInter-VRF communication Static and dynamic inter-VRF routing For example VRF-lite features in AW+ Ping VRF aware services includeRoute limiting per VRF instance VRF-aware utilities within AW+ SSH client  Telnet 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 Can be replaced with Using the route-target commandRoute-target import ASNVRFinstance For example Route-target both ASNVRFinstance For exampleVia BGP IVR, VRF shared will end up with the routes Also, if VRF shared configuration includesIf VRF red initially includes If VRF shared initially includesThen 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 Network description Configuring a complex inter-VRF solution Each VLANs is associated with a VRF instance VRF communication plan Configuration breakdown Configure VRF-lite Configure Vrfs Configure the hardware ACLs Within the same IP subnet that the switch port is a member This example, three access groups are attached to port192.168.43.0/24 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 Grey Other features used in this configurationVCStack and VRF-lite Stack provisioningVirtual Chassis ID X610 VCStack configurationX900 configuration 74 Configure VRF-lite Port Sharing VRF routing and double tagging on the same portCommunication plan GreenX610 a ConfigurationsX610 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 limitsAllowed number of fib routes excluding Connect and Static Configuring Dynamic route limits100 Syntax No max-fib-routesVRF-lite usage guidelines General Useful VRF-related diagnostics command listRouting general Routing protocols IP prefix network, e.g TCPdump HW platform table commands

C613-16164-00 REV E specifications

The Allied Telesis C613-16164-00 REV E is a robust networking device designed to enhance connectivity and communication within enterprise environments. Renowned for its reliability and efficiency, this device serves as an ideal choice for organizations seeking to improve their network infrastructure.

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