Tag Archives: junos

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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Junos/IOS RSVP tunnel configuration

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

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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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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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Multicast: From JUNOS

IP address range: 224.0.0.0 to 239.255.255.255 First 4 bits of multicast IP address set to “1110”. 28 bits remaining to choose unique address. IP to mac mapping: 01:00:5E:[0:last 23 bits from multicast IP address]. 5 bits from IP address becomes … Continue reading

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Junos sample BGP configuration

root> show configuration routing-options graceful-restart; ## To enable GR globally static { route 1.1.1.1/32 next-hop 10.2.2.2; } autonomous-system 65020 loops 2; ## Local router AS number and local router is allowed to see its AS number twice in AS path.

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BGP: From JUNOS

BGP: Uses TCP port number 179. Peer Type: External BGP session: Two BGP routers in different AS networks. TTL set to 1. Internal BGP session: Two routers in same AS networks. TTL value set to default 64. BGP states: Idle: … Continue reading

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IS-IS : From JUNOS

ISIS – From JUNOS Basic concepts and configuration: Intermediate system to Intermediate system (ISIS) was originally developed for Connectionless Network Protocol (CLNP) and later adapted to support IP. ISIS Levels: Level-2 and Level1. Two routers form Level-2 adjacency when the … Continue reading

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Junos sample ISIS Configuration

root@Juniper> show configuration protocols isis traceoptions { ## to store debug information to file “isis-test” file isis-test; flag all receive detail; ## debug on all isis received packets } export [ route-leak-L2-L1 summary-L1-L2 ]; ## export map for route leak … Continue reading

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Junos sample ospf configuration

root> show configuration protocols ospf ## shows current active configuration graceful-restart { ## graceful restart feature: default mode: Possible helper restart-duration 500; ## default: 180 sec. within which the neighbors should be formed notify-duration 1000; ## default: 30 sec. After … Continue reading

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