Category Archives: rsvp

Layer-2 and Layer-3 VPN: From JUNOS

Common terminologies: Customer-edge, provide-edge, provider router. VRF – Virtual Routing and Forwarding table: Used in L3 VPN to store customer routes. VFT – Virtual Forwarding table: Advertisements

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Junos/IOS RSVP tunnel configuration

root@Juniper> show configuration interfaces em0 { unit 0 {

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Advanced MPLS: From JUNOS

Constrained Shortest path first (CSPF) CSFP is the modified version of SPF algorithm where the data is taken from TED (Traffic engineering database) which has much information about networks like each router’s interface bandwidth, available priority values and other administrative … Continue reading

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RSVP and LDP: From JUNOS

Resource Reservation Protocol (RSVP): IP protocol number: 46 (0x2e in Hex). Each RSVP packet has common RSVP header which consist of following fields: Version – 4 bits – set to 0x01 Flags – 4 bits –000A. When bit A is … Continue reading

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Basic MPLS and configuration: From JUNOS

MPLSs’ original goal was to increase the routers’ packet processing speed. But now, due to advancement in ASIC, it is primarily used for traffic engineering. Terminologies:  LSP – Label switched path. A unidirectional logical link created by MPLS protocol. LSR … Continue reading

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