Tag Archives: mpls

RR in MPLS

Awesome material about implementing Route Reflector in MPLS network. Functionality of RR in MPLS; It should accept all vpnv4 prefix. RR-groups can be implement so that only those vpnv4 routes filtered by RT/SOO are stored. Reflect all vpnv4 prefix without … Continue reading

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eBGP as CE-PE Routing Protocol in MPLS

We can use any of the below protocols as CE-PR routing protocol in MPLS domain. Connected Static RIPv2 OSPF EIGRP ISIS eBGP Note: we cannot have iBGP session. Advantages of using eBGP as CE_PE routing protocol: 1)NO need to specifically … Continue reading

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OSPF Sham Link

Few Points on Sham Link; Why we need a sham link; In MPLS-VPN, there might be 2 link connecting two sites of a same customer; 1) Via MPLS core network 2) Direct Backdoor link. If  OSPF is used in the … Continue reading

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Route-target import/export

Here is what happening when we add a RT import statement in a VRF. Assume the MPLS-iBGP session is UP among the PE routers; Once we entered a import RT, route-refresh message is sent to iBGP  neighbor(PE routers) and an … Continue reading

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Study List for MPLS Exam

MPLS Fundamentals MPLS and VPN Architectures volume-1 MPLS and VPN Architectures volume-2 MPLS related RFCs Recap of BGP from; Routing TCP/IP, Volume II Internet Routing Architecture

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