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Questions tagged [bgp]

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

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Can GoBGP or FRRouting provide real-time BGP announce message?

Our old BGP monitor system uses ExaBGP to collect real-time BGP announcement messages. This system is usually installed in a Linux agent which will become peers of many other routers/switches, so that ...
Chengyuan Zhang's user avatar
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StrongSwan and Bird BGP route propagation

I have the following networks successfully connected through IPSec StrongSwan tunnel (ie. I can ping both sides through private IP addresses): VPS1: 192.168.8.44 -- VPS2: 192.168.1.21 I want to ...
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bare-metal k8s zone routing for use with Multus cni

I have a Kubernetes cluster, every node is located in a different network (different data centers) So I need to route a public IP address range to this cluster and use those IPv4 addresses within the ...
Vahid Alimohamadi's user avatar
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Bird2 BGP [unreachable XXXX dev lo proto bird metric 32 pref medium]

The information I have obtained from the supplier is as follows. Router ASN:AS56655 Router endpoint:2a03:94e0:f254:: Your endpoint:2a03:94e0:ffff:185:243:218::43 Multihop:Yes Route table:Full So I ...
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Routing to custom remote destinations from VPCs through dynamic BGP VPN

I have a dynamic BGP VPN between a VPC and an on-premise site (on-premise uses vyOS router/vpn concentrator). Servers in the VPC and on-premise subnets can communicate directly through he VPN. The on-...
Unpossible's user avatar
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load balancing with Bird

I have the following routes pushed into my edge router 192.0.10.0/32 via 192.168.166.110 on br166 [master01 22:53:55] * (100) [AS64514?] via 192.168.166.116 on br166 [worker_03 ...
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Will anycast failover to the next server if it encounters a 404 from an nginx server?

I know that anycast will failover for layer 3 issues but will anycast failover if a file is not present? I.E. like a 404? It seems like it won't, like as long as nginx returns something anycast will ...
user970705's user avatar
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1 answer
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IPv6 Forwarding working 1 way externally

Originally Asked on Network Engineering but told to ask on here instead. I'm having a problem with routing my own ipv6 prefix for anycast. I got my ASN and IPV6/48 sponsored with RIPE and I am ...
Entrepreneur AJ's user avatar
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FRR not sending BGP advertisements on debian 11

I am trying to get bgp working in a lab environment between 4 routers. I have 1 central router and 3 branches. 3 of the 4 machines are debian11 machines and 1 branch is a windows server 2019 which I ...
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BGP: I cannot ping an address even though it exists in the routing table

I have the topology from the attached image with I-BGP neighborship between 192.168.21.1 and 192.168.21.2 and E-BGP neighborship between 192.168.6.1 and 192.168.6.2. I have advertised network 2.2.2.2/...
Alex Dobre's user avatar
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Nagios on a virtual network

I am trying to emulate a virtual network in Kathara (ex. NetKit), based on OSPF and BGP routing and I am new to this. After emulating the network I need to monitor it using Nagios, but my question is ...
Jul's user avatar
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AWS Site-to-Site VPN with BGP - how routes are advertized via BGP?

I've configured redundant site-to-site VPN between AWS and GCP with 2 VPN connections, 4 tunnels and BGP dynamic routing. Everything works, all good, servers on both sides of the tunnels can reach ...
Dmitry's user avatar
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About MPLS label range

In most routers or switches that support MPLS, if transit label and uhp LSP label need to have a different label range? when protocol(LDP or BGP) assign labels, I know that VPN label and LSP tunnel ...
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bird2 BGP how to announce subnets from the same ASN but from another router

I am trying to learn more about BGP / IPv6, this is my goal: Currently, for testing, I have a VM from a provider that gives me an /44 network This is the current configuration on that VM: router id &...
nbari's user avatar
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Why does bgp OPEN message get Connect Socket: Connection reset by peer when node is on a different subnet/gateway

My network setup: Kubernetes network setup With this setup, only nodes on same subnet can establish bgp connection. Other nodes (that do a full 3 way tcp handshake), responds to hte OPEN message with [...
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Reached cloud router limits

I have reached the limit of 5 cloud routers per region, if I edit the quotas I can see only a project limit, is it possible to increase the limit of 5 cloud routers per region? if yes, how? Also I ...
turbos's user avatar
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Forwarding packets using multiple servers

I have a IP block from RIR. I'm using two providers for make anycast to "some" IPs. I will call this as A and B. I want forward to other provider when that IP not at that location. I'm using ...
Hoto Cocoa's user avatar
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Configuring BGP with local-preference set with FRRouting

I want to configure a multi-homed BGP router with preference for one ISP. My actual setup will only receive the default routes and not the full BGP feed from the upstream ISPs. But in this test setup ...
Saumya Kanta Swain's user avatar
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Ubuntu 18.04 IP forwarding will not forward packets received over GRE tunnel

I have two servers, Server A and Server B. Traffic for subnet 192.168.1.0/24 comes in through server A. Server A has a GRE tunnel setup with Server B, and routes all traffic received for 192.168.1.0/...
Michale Anthony's user avatar
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High usage IRQ/CPU on Centos 8 router BGP

PRC | sys 0.34s | user 0.10s | | #proc 124 | #trun 2 | #tslpi 93 | | #tslpu 0 | #zombie 0 | clones 0 | | #exit 0 | CPU | sys ...
ccc ddd's user avatar
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Is it possible to filter directly connected networks redistribute with BGP based on a peer basis?

Assume a simplified case in which router R1 is connected to two BGP peers: one eBGP peer and one iBGP peer. Is there a possibility to advertise directly connected routes only to one of them ...
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Route-Distinguisher (RD) to import and export the prefixes?

Why can't we use Route Distinguisher(RD) as a tag to import and export the prefixes/routes. It is also a unique value per customer, why use the second parameter?
Not-a-Coder's user avatar
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Cisco ISR4431 router randomly reboots

I have a Cisco ISR4431 acting internet edge router that has been randomly rebooting every 5 days or so. When it reboots it takes anywhere from 10-60 minutes before it is back up and network traffic ...
John P's user avatar
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Routing to a simulated network running inside an AWS Instance

So, we're running a simulated network on a server in AWS and i'm trying to figure our how to enable routing to that simulated network both from inside AWS and from our remote offices. Our VPC CIDR ...
MCC's user avatar
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What kind of routes can be propagated to VPC route tables?

in AWS, What kind of routes can be propagated to VPC route tables ? I know: site-to-site VPN routes via Virtual Private Gateway anything else ?
exeral's user avatar
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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 ...
Ryota's user avatar
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Allow devices in in a VPN direct access to the internet in AWS

Is it possible to route all traffic from a site-to-site VPN connection to the public internet? Currently, I have set up Squid as a proxy. Since I need to forward also non-http/s protocols I would ...
Mark's user avatar
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iBGP routes from same router id received but not learned

I'm using FRR for BGP. I have the following setup: router 0, 1, and 2 are all part of the same AS (so everything is iBGP). Router 0 is connected to 1 and 2, 1 and 2 are not connected to each other (0 ...
theasianpianist's user avatar
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1 answer
860 views

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) ...
wasanga7's user avatar
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1 answer
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Under volumetric DDoS can I prevent ISP null-routing by turning NIC off briefly?

A server in a data center is getting a volumetric DDoS attack. Congestion starts to build up and the data center/ISP going to solve this by null-routing (RTBH routing) the server's IP address for ...
diviaki's user avatar
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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 ...
candtec's user avatar
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1 answer
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Virtual Switching Sanity Check - NFS, BGP & Kubernetes

I have a home Kubernetes cluster that runs in 4 VMs on top of Proxmox. Proxmox is tagged to VLAN 20, the Kubernetes VMs are tagged to VLAN 40. The Kubernetes VMs are BGP neighbors of my router so ...
TJ Zimmerman's user avatar
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1 answer
308 views

Get high availability with BGP

I want get high availability with BGP (mostly for DDoS Attack) I have.. Ubuntu servers(not Vultr's) and Vultr's ubuntu servers and I'll rent /24 IP block and AS Number soon..(and link it to vultr) (...
bibi's user avatar
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1 answer
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GCP: Routing to ip alias over IKEv1 VPN without BGP

I have a private GKE cluster running in a single subnet and region. The nodes in the cluster utilize the subnet's CIDR of 10.60.0.0/16. The cluster has two secondary CIDR ranges for its pods and ...
Ryan Smith's user avatar
1 vote
0 answers
417 views

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 ...
Ben's user avatar
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1 answer
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IP Transit Using GCP compute instance?

If I announce my IP space on GCP compute engine and connect to GCP via a Dedicated interconnect, as the inbound transfer on GCP is free, can I use GCP as my inbound IP Transit
asadullah sayyad's user avatar
1 vote
0 answers
270 views

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 ...
Hidden's user avatar
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1 answer
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Share AWS DirectConnect between multiple accounts

AWS allows you to share your DirectConnect connection amongst multiple AWS accounts via a hosted virtual interface (instructions here). I have a pfSense device on the local side of an MPLS line for ...
TPCoMatt's user avatar
1 vote
1 answer
123 views

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-...
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can I still map an IP address to its ASN number when the last octet is masked?

I have a database of IP addresses whose last octet has been masked IpAnonymizer.mask_ip("8.8.4.4") # => "8.8.4.0" Can I still use map these IPs to their respective Autonomous Numbers or the ...
ℕʘʘḆḽḘ's user avatar
3 votes
0 answers
948 views

NGINX: Map IP to ASN

in Preparation for GDPR I want my NGINX to not log IP's any longer, but log the AS Number. To map the ip to an AS number, I would use the BGP datasets from Ripe, and import them in an MySQL table. ...
margau's user avatar
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1 vote
2 answers
164 views

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 ...
yakatz's user avatar
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EdgeOS BGP routes received but not being injected

I'm trying to set up BGP over IPSEC with Google Cloud Platform. The IPSEC tunnel is successfully established, and GCP reports the BGP session as up. EdgeMax router is receiving the routes, but isn't ...
Isvara's user avatar
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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 ...
arivero's user avatar
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1 vote
1 answer
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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 ...
Bryan Vukich's user avatar
2 votes
1 answer
91 views

Cisco - BGP Best Path Algorithm - Which criteria

I set up below topology on Cisco IOU environment. R1, R2 and R3 routers are configured with one loopback interface on each, having "1.1.1.1", "2.2.2.2" and "3.3.3.3" addresses respectively. These ...
Jim Raynor's user avatar
-2 votes
1 answer
128 views

How to create a group of servers listening on the same IP-address, allowing failover/takeover? [closed]

I'd like to deploy a web application in a robust manner. The application itself is written using Elixir, which runs on top of Erlang/OTP, meaning that the application can be deployed on different ...
Qqwy's user avatar
  • 169
2 votes
1 answer
541 views

bind address of application on multihomed server

I have a multi-homed server running bgp via quagga If I fire up an application on this server that initiates a connection, by default it is going to choose the interface with the lowest metric, ie ...
camelccc's user avatar
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0 answers
252 views

configuring MD5 bgp authentication on solaris 11 using quagga

I am attempting to configure a BGP router within a solaris zone, using dedicated network interfaces. Upstream provider insists on the use of MD5 authentication. I have no bgp sessions coming up. I ...
camelccc's user avatar
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0 votes
1 answer
475 views

BGP interaction with IGP

I know that there are substantially two ways in which BGP and IGP can interact: 1) Distribution of default 0/0 route into IGP (for example OSPF, IS-IS, RIP,..) 2) Injection of BGP-learned route into ...
Alessandro's user avatar