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Networking

Cisco IOS Python Requests

7 minute read

Cisco IOS Python Requests In this example, there are two routers connected by a single link and OSPF is enabled to advertise the static routes into OSPF.

Cisco IOS OSPF Example

7 minute read

Cisco IOS OSPF Example In this example, there are two routers connected by a single link and OSPF is enabled to advertise the static routes into OSPF.

MAC VRF Configuration Examples

less than 1 minute read

MAC VRF Configuration Examples MAC-VRF Instances Enable Common EVPN Configuration across Platforms

MPLS L2VPNs

less than 1 minute read

Introduction to MPLS L2VPNs While working on MPLS L2VPNs, these are the topics that we need to be familiar with:

BGP Labeled Unicast

less than 1 minute read

For creating MPLS LSPs, other than RSVP, LDP, and SR, we can also make use of BGP. BGP can advertise transport labels, using a speical address family.

Segment Routing

2 minute read

Source Packet Routing in Networking (SPRING)

Map specific traffic to an LSP

less than 1 minute read

Use a policy to map specific traffic to an LSP We need a way to tell our router what traffic should be mapped to which LSP. In Junos, this is done through ro...

RSVP Node-Link-Protection

2 minute read

Facility Backup (Node-Link-Protection) To protect against link failure and node failure, RSVP LSPs can create always-on backup LSPs. These backup paths start...

RSVP FastReroute

1 minute read

One-to-One Local Repair (Fast Reroute)

RSVP Primary and Secondary LSPs

3 minute read

Primary and Secondary Paths We can create multiple named paths for an LSP, each path with its own constraints like BW, Admin groups, strict and loose hops et...

Tearing down RSVP LSPs

2 minute read

RSVP Messages To deal with RSVP failures, problems, and errors PathTear- travel in the same direction as Path (towards egress) ResvTear- travel in the s...

Administrative Groups

1 minute read

Tag links to be used or to be avoided It is possible to tag links either to be avoided or used during the LSP path calculation. We configure admin groups on ...

RSVP LSP Bandwidth

1 minute read

Reserving BW on RSVP LSPs By default, all types of traffic go over an LSP. If required, we can map specific traffic to specific LSPs using a policy.

Constrained Shortest Path First

1 minute read

CSPF CSPF is an advanced version of SPF, using the TED links are pruned if they do not have enough BW or tagged to be avoided or don’t contain mandatory tags...

Resource Reservation Protocol

5 minute read

RSVP We cant build a large network with static LSPs so we need a protocol like RSVP. RSVP still requires manual configuration on the ingress router, every ot...

MPLS in Junos

6 minute read

Multi Protocol Label Switching