Showing posts with label routing. Show all posts
Showing posts with label routing. Show all posts
Monday, December 4, 2023

How to create an IPv6 route to null/blackhole in Linux

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 Case:     How to create an IPv6 route to null/blackhole in Linux Command:    ip -6 route add blackhole fd00:12:34::0/48 I hope it is useful
Thursday, December 1, 2022

An Interesting Change Is Coming to BGP

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A route leak is defined as the propagation of routing announcement(s) beyond their intended scope (RFC 7908). But why do route leaks occur? ...
Thursday, September 3, 2020

Solved: Closing connection because of an I/O error in FRR - at least in Ubuntu

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 If you are getting this message in FRR: Closing connection because of an I/O error in FR The solution is straight forward. You have to comp...
Monday, July 8, 2019

BGP: To filter or not to filter by prefix size. That is the question

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Introduction In order to write these post the R+D team and the WARP team joint together after analyzing some security incidents related ...
Monday, February 29, 2016

Read a BGP live stream from CAIDA

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Objective   Read a BGP live stream from CAIDA and insert them into a BGP session What do we need   bgpreader from the bgpstream core pac...
Tuesday, February 17, 2015

Solution to quagga vtysh "Exiting: failed to connect to any daemons."

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Description:    When you run the command in the linux shell vtysh to connect to the quagga daemons (such as bgpd, ospfd, etc) returns  the ...
Thursday, February 21, 2013

Advertising IPv6 Routes Between IPv4 BGP Peers (Cisco)

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Situation:    I want to advertise IPv6 networks / prefixes over IPv4 eBGP session History:    Although not common, this case may occur in so...