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Questions tagged [bgp]

BGP (Border Gateway Protocol) is one of the core routing protocols of the internet.

BGP (Border Gateway Protocol) is a protocol for exchanging routing information between gateway hosts (each with its own router) in a network of autonomous systems.

BGP is known as a path-vector protocol, the routing table contains a list of known routers, the addresses they can reach, and a cost metric associated with the path to each router so that the best available route is chosen.

Resources

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Multihomed BGP linux router

I'm in the process of researching solutions for a new network location rollout. We are going to have two providers one on 100mbit and 50mbit commits.. I'm wondering what linux solution i could build that could handle that much traffic. and also how…
user56579
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BGP Multihomed/Multi-location best practice

We're in the process of designing a new iteration of our network where we improve resilliency by adding a second datacentre. We'll be adding a second datacentre, with an identical configuration of servers as our primary location. To achieve…
Tom O'Connor
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VPN between on prem and GCP: routes shared but ping doesn't go through

I have been struggling with the VPN setup between on-prem and GCP for more than a week. I am completely out of ideas at this point, and would love to get some help of network specialists. Goal The end goal is simple: to get a VM instance on GCP to…
Ryota
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Problems with RD, RT import and RT export in MPLS VPN and BGP

I'm learning MPLS VPN with MP-BGP and I'm finding difficulties with undertstanding the RD value and the RT import and export values. From what I've already understand, RD (route distinguisher) identifies the VRFs from a network that compose the same…
wasanga7
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Provide internet access on the GCP side to an advertised bgp route

I have been looking for a solution for the above for a few days now and I've not come across a config that works. Current setup: I have a GCP CloudVPN with dynamic routing setup with an external provider. The advertised routes are received properly.…
candtec
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Juniper SRX300 Maximum BGP routes

I've got a Juniper SRX300 which i'm using to connect to 2 BGP peers. The documentation i've read says this SRX only supports 300,000 BGP routes, so for each peer I created an import policy (based on communities) to only accept my peers customer…
Ben
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Quagga BGP - How do I remove a blackhole from Quagga BGP configuration

In the above screenshot you can see that the preferred route for 10.120.15.0/24 is into a 0.0.0.0 black hole. First, how do I remove that black hole from vtysh Second how do I add a new IP in there with a high weighting to replace the old…
Sebastian Patten
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how can I know since when has a BGP prefix been allocated?

I am a bit confused. I would like to know since when a current ASN (and its corresponding prefixes) have been in place. When I look at the example at team-cymru (http://www.team-cymru.com/IP-ASN-mapping.html) I see: $ whois -h whois.cymru.com " -v…
ℕʘʘḆḽḘ
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Synchronize states of bridge interfaces

We have redundant 10G fiber links to our upstream internet provider in an active/failover configuration. Between our router and the upstream router, we have a pair of firewalls running Vyos in transparent mode. We use BGP for route advertisement and…
yakatz
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Can the RPK infrastructure sign a SSL certificate for an IP? Will browsers recognize it?

In theory every AS, ISP provider or whatever, holds a certificate proving that it owns the range of addresses assigned to him. This is the Resource Public Key Infrastructure (RPKI) and it seems well implemented. If I understand correctly, the ISP is…
arivero
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VPN to Shared VPC in GCP incorrect BGP routes being chosen as best

We have route based VPN tunnels going from a pair of Cisco routers at each of two sites (4 total routers), to two different VPN Gateways in the same shared VPC (XPN). Sharing routes through BGP, to a single Cloud Router. The two sites on our side…
Bryan Vukich
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Sizing Firewall for Micro-Datacenter

We have a small data center we're finishing. We have a core+spline and then redundant TOR switches. Everything is basically whitebox 10gb switches running Cumulus; although, we will upgrade the core within the next 12 months to be 40gb, but this…
Ethode
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Traceroute and BGP peering

Doing a traceroute for example: 1: 1ms 1ms 1ms 1.1.1.1 2: 2ms 2ms 2ms 2.2.2.2 3: 5ms 5ms 5ms 3.3.3.3 4: 9ms 9ms 9ms 4.4.4.4 My question is: If the AS number of 2.2.2.2 and 3.3.3.3 are not peering directly, is it possible to get a traceroute…
Shiji.J
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BGP redistribute connected

I used the quagga package to learn BGP in my test Network. So i used the command redistribute connected that sends the Router UPDATE message as expected with all the links. However my task is to prevent it from advertising a particular subnet. I…
Ankur Bhatia
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Routing Issue - can't ping gateway from other routers in full mesh

I am setting up a new network. I have 4 routers in a full mesh. Edge1, Edge2, Client1, Client2. This are Mikrotik Cloud Core Routers (not that it matters). They are set up with OSPF (distributing connected and static routes) and MPLS, and…
Dennett Ingram
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