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Questions tagged [bgp]

BGP (Border Gateway Protocol) is a routing protocol that is primarily used to make routing decisions on today's internet. Questions must be about scripting BGP only. General BGP questions may be asked on https://serverfault.com or https://networkengineering.stackexchange.com

Border Gateway Protocol(BGP) is how the Internet routes traffic between routers. BGP advertises routes for a given IP and selects the best one for the traffic. The current version of the Border Gateway Protocol (BGP) which is BGP-4 is described in RFC4271 (https://tools.ietf.org/html/rfc4271).

Questions about the various BGP scripting languages are on-topic. Questions about BGP (routing, hardware, etc.) in general are not. Sites where you can ask broader BGP questions include

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Two Datacenter location with same BGP AS number but separate Prefixes

If APNIC has allocated us a single AS Number e.g 13777 With single ipv4 pool 1.1.1.0/23 can we use 2 prefixes across multiple data centres with same AS No e.g Datacentre1 AS no 13777 advertising 1.1.0.0/24 Datacentre2 AS no 13777 advertising…
Prasad V
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Quotas and limits on received routes in BGP session

Are there any limits on the number of routes received on BGP session in Google Cloud Router?
Mahaboob
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No /etc/quagga folder and no quagga service

I am trying to use quagga to run BGP. I installed the latest version of quagga from source. According to the documentation, I should have a /etc/quagga folder where I need to copy my bgp config as bgpd.conf However, after installing quagga (using…
brokendreams
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Understanding format of RIB dumps from Oregon Route-views

I am working on a project in which I need to analyse the rib-dumps from the Oregon Routeviews Project. I download the .bz2 file from here for a specific time and date for a specific node. These files are generated every 2 hours. Then I unzipped and…
Mrigank Chugh
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experimenting with BGP using Quagga and a set of openWrt routers

I want to learn and experiment with BGP protocol by some non-trivial scenarios: setup anycasting, see how quickly and what way routing changes after I disconnect some link, etc. As I understand I cannot easily and should not do it on "the real…
morgwai
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default route: bgp vs. static

I'm asking why should one receive a redistributed default route from bgp upstreams and not creating an own static default route pointing to the bgp neighbor as next-hop? Are there any advantages in receiving the default route from bgp? Thanks for…
kindof11
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BGP NLRI / how much prefixes can be sent

the question is about BGP update messages, namely about the maximal amount of prefixes which can be places in an NLRI.
malocho
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about ibgp config and ping Time exceeded: Hop limit

I am configuring iBGP Now there are two machines RS1 and RS2 They use Ubuntu 18 and bird 1.6 RS1 connected to as6939 RS2 connected to as20473 2000:1::/48 Announced on RS1 2000:2:: 48 Announced on RS2 RS1 and RS2 are connected through zerotier, and…
kagurazaka shira
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Does Akamai support anycasted origins?

I wonder if Akamai supports origins with anycast IP addresses? Or will requests to origins be routed within Akamais networks to just one (almost random) location? I'd expect Akamai to route the request to the origin closest to the edge server.
Mikael Dúi Bolinder
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BGP route selection

So given the information AS A is a customer of AS B and AS E, and A is peering with AS C and AS D; From what I understand, in the first step, we have to discard the routes with the lower local preferences. In this case, A is a customer of B, then…
Yunhao Lin
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How to Implement RPKI for our network?

I read a few articles and some docs in various forums but I didn't get any clarity about it. Are there any methods do I have to follow to implement RPKI-BGP in my network. Please help
Niranjan
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How to tell pip where to find dependencies necessary to install a package ? The package is pybgpstream and the dependencies is bgpstream

I would like to use bgpstream. I installed it. I test it using BGPReader in command line and everything seems to work correctly. Now I would like to install pybgpstream to use the tool in my python scripts. To install pybgpstream you first have to…
Sagawill
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BGP: Longest prefix vs. shortest path

Assume that an autonomous system AS0 receives the following two announcements from its peers: AS1: 42.0.0.0/8 with path length 10 AS2: 42.0.0.0/16 with path length 20 Now, where a packet with destination address 42.0.0.1 will be routed by AS0? To…
nils1f5
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How BGPView.io determines traffic direction

I'm interested in how https://bgpview.io/asn/19551 got this information: TRAFFIC RATIO: Mostly Outbound I'd like to get more information about an ASN than is available on bgpview.io. I didn't find any external source which allows me to get this…
user3742227
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Does GCP Cloud Router not support BGP auth?

I wanted to configure on GCP Cloud Router a BGP session with BGP authentication (for on-premise connectivity / hybrid connectiviy), but cannot fine any option to set a password in the gcloud CLI or Web client? Does GCP not support BGP…
sitiTW88
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