Showing posts with label cisco. Show all posts
Showing posts with label cisco. Show all posts
Sunday, June 9, 2024

Cisco hidden command: bgp bestpath as-path multipath-relax

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Hidden command   bgp bestpath as-path multipath-relax What for is this? By default, Cisco does not do load-balance or distribute traffic bet...
Thursday, February 1, 2024

A Much-Needed BGP RFC: AS Path Prepending

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Introduction The Border Gateway Protocol (BGP) plays a critical role in building and maintaining Internet routing tables, so much so that it...
Saturday, July 24, 2021

Solved: GNS3 - Private Vlan - non-operational - Cisco

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Status:   In summary: private vlan are not working in GNS3, not even using IOU or VIRL Solution:   User IOU i86bi-linux-l2-adventerprisek9-1...
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 ...
Saturday, April 13, 2013

In case of emergency break glass. ¡Console cable inside!

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  ( I really don't know if this image/joke existed before, it came to my mind attending a failure last week) If you need fi...
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...
Friday, January 4, 2013

Cisco clear line does not work

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Case: When performing a "clear line" in a Cisco Router/Switch to disconnect a Telnet or SSH session does not work. The user stil...