Thursday, July 16, 2015

Segment Routing Based MPLS Vs Classic MPLS

Previous post has already covered why segment routing is required with all it's basic information. This post is mainly focusing on difference between SR Based MPLS Networks Vs Classic MPLS Networks.

Segment Routing Based MPLSClassic MPLS
MPLS TransportIGPIGP + LDP
IGP/LDP synchronizationNot RequiredRequired and Added More Latecny in Convergence
50msec FRRIGPIGP + RSVP-TE
Extra TE states to support FRRNo extra stateExtra states to manage
Optimum backup pathYesNo
ECMP-capability for TEInbuiltNo
TE state only at headendYesNo (n^2 problem at midpoint)
Seamless Interworking with classic MPLSYesNA
SDN SupportYesNo
RoutingConstraint Based (Source can Define)Destination Based + RSVP-TE
Link information (Bandwidth, IGP metric, TE metric, SRLG ) is flooded throughout the IGP domainNo
Path CalculationCSPF or By Using Centralized ControllerIGP + RSVP-TE
ScalabilityHighLow
Operations and TroubleshootingLowHigh
And here is the rest of it.

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2 comments:

Olap on Hadoop said...

Great post!!

Chandra said...

Are there any service providers who are using Segment Routing in their Live/Production Network. Are there any know challenges/limitations going with this.