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titleRARE validated design: [ BGP RR #001 ]- key take-away
  • BGP Router Reflector use case does not require a commercial vendor router, it can be handled perfectly by a sowftare solution running on a server with enoough RAM.

The example above an example of a high availability Route Reflector that is able to handle BGP signalling for a high carrier Service Provider for all address familay

  • Redundant BGP Router Reflection is ensured by deploying 2 RR (at minimum) belonging to the same BGP RR cluster 

In addition to have several RR for the whole domain, it is also common to see hierarchical RR design. SOme Service provider deploy dedicated RR for specific address family (L3VPN unicast for example)

  • RR in the same cluster run basic iBGP session

These RR also share the same cluster ID, in order to ensure route withdraw in case of routing advertisement

  • RR should not be in the traffic datapath

This is the reason why we are setting high cost (4444 and 6666) for IPv4 and IPv6 respectively on both direction on the RR(s) interconnections ports

  • RR design for a multi-service backbone

In the example, the RR client are running only IPv4/IPv6 but the RR design above can empower a Service provider backbone with additional service running on TOP of MPLS, L3VPN, 6VPE, VPLS EVPN etc.

  • In the next article we will dissect the rr1 configurations

This will demonstrate some nice features proposed by freeRouter such as BGP template and nexthop tracking among a list of other feature not mentioned here... (like BGP add-path)


Warning
titleRR design test

You can test this desig design above in order to check RR and backbone router signalling.

  • Set up freeRouter environment as describe above
  • Get RARE code
Code Block
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titleClone RARE code from repository 
 git clone https://github.com/frederic-loui/RARE.git


Code Block
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titleLaunch the Service Provider example (diagram above)
cd RARE/00-unit-labs/0101-rare-validated-design-bgp/
make


Code Block
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titleAccess routers using the following command:
c1: telnet localhost 10001 
c2: telnet localhost 10002 
c3: telnet localhost 10003 
c4: telnet localhost 10004 
c4: telnet localhost 10005 
c6: telnet localhost 10006 
c7: telnet localhost 10007 
c8: telnet localhost 10008 
rr1: telnet localhost 10010 
rr2: telnet localhost 10011


Code Block
languagebash
themeMidnight
titleLaunch the Service Provider example (diagram above)
cd RARE/00-unit-labs/0101-rare-validated-design-bgp/
make clean

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