Monthly Archives: November 2010

Junos/IOS L3 VPN configuration

<Juniper PE router configuration> ## Topology diagram at the end ## root@Juniper> show configuration routing-instances Advertisements

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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:

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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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CoS and configuration: From JUNOS

Terminologies: Classification: examine the incoming packets and associate with a service. Behavior Aggregate: A method of classification. Single field is examined. (Cos bits) Multi-field classifier: A method of classification. Multiple fields are examined.

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Security: From JUNOS

Three security principles: Integrity: The network resources are operating as expected and have not been compromised. Also provides for the security of transmitted packets across the network. Availability: Authorized network personnel should have reliable and timely access to data packets … Continue reading

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IPv6: From JUNOS

IPv6 – 128 bits and represented in hexa decimal format. Each IPv6 packet has 40-byte header. Following fields are available: Version – 4 bits – set to 0x6

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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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Junos sample multicast configuration

root> show configuration interfaces lo0 unit 0 { family inet { address 2.2.2.2/32; ## Shared IP address to be used in anycast RP.

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