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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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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 is flowing normally. It is running BGP and…
John P
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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 prefer that the devices connect directly to the…
Mark
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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 is configured as a route-reflector) Router 0 has…
theasianpianist
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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 several hours. However the attacks are much sorter,…
diviaki
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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 that I can tag pods to then run on one of two other…
TJ Zimmerman
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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) (Unfortunately,we need to pay $2000 to get ddos…
bibi
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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 services (172.24.0.0/19 and 172.24.32.0/20…
Ryan Smith
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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
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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 the BGP connection. All of this works currently. …
TPCoMatt
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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 mapping is lost? Thanks!
ℕʘʘḆḽḘ
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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 injecting them into the RIB. dan@router:~$ show ip…
Isvara
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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 believe I have tracked down the problem to the…
camelccc
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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 Interior Gateway Protocol. I've read that the…
Alessandro
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Separating networks on 2 bgps from 2 ISP

I have Cisco router with 2 bgp's sessions from 2 isp's and want to separate my networks for example 80.80.80.0/24 to go trough first ISP and 90.90.90.0/24 to go trough the second ISP, but to have the option if one of them goes down the traffic to be…
Damjan Nikolovski
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pfSense to Amazon VPC IPsec VPN Tunnel Fails to Connect

I'm trying to setup an IPsec VPN tunnel with BGP routing from a pfSense 2.3.2 firewall to a recently created AWS VPC.I've installed OpenBGPD on the pfSense firewall. I've followed this tutorial:…
Edward Williams
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