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

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76 views

Transparent proxy cache on BGP multihome

Provider A have transparent caching with squid . In the situation which a client has multihome BGP with provider A and provider B then client does not send its outgoing traffic (upload) to provider ...
4
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1answer
905 views

Linux “traceroute -A” (AS path lookup) equivalent for Win XP?

Can anyone recommend a Win XP command-line traceroute implementation providing a function equivalent to the Linux "traceroute -A" option, which includes in its output the BGP AS number (Autonomous ...
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1answer
72 views

How to find which routing protocol a router is using. And if found how to test it

I was recently asked a networking question in an interview which I did answer but the interviewer was not pleased. The question was : "Given an actively running router, how would you know what ...
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1answer
32 views

Use of loopback Interface in iBGP

As I understand that the loopback interface(127.0.0.1) is used to route packets back to the source. How is it then used to talk to iBGP neighbors? I understand that the goal is to ensure that the ...
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1answer
21 views

High latency when enabling secondary BGP server for same networks?

I have two BGP servers on OpenBSD using bgpd that are located in the same DC; I tried to enable multihoming for the same networks on both of the servers, but upon doing so all hosts in that DC started ...
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1answer
59 views

How to connect Network and GRE Tunnel Traffic and control and flow of TCP/UDP Packets?

I need some serious help with a complex routing setup I am doing. Lets I have a /24 IPv4 .I am announcing the same /24 at two different locations. One is a ISP exchange center where all the ISPs peer ...
0
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1answer
59 views

Filter OSPF routes redistributed by BGP

I am redistributing OSPF routes inside a network, through BGP. However I don't want to redistribute all the advertised routes from OSPF (specificaly the private networks) to the outside of the AS. How ...
0
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1answer
237 views

BIRD iBGP - Route not reachable

i have two machines participating in the DN42 network, a darknet driven by the Chaos Computer Club and others to play around with advanced routing techniques like BGP and stuff. The machines are ...
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1answer
22 views

Is it possible to run IPv6 only BGP sessions?

We wish to peer with some members of an IXP that all support IPv6 peering. We do not wish to publicly peer on the IXP. Is it possible to save ourselves the trouble of getting a /24 block of v4's and ...
0
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1answer
70 views

BGP Dual-As support, any RFC?

Generally most of routers like cisco and junos allow a router to have dual-As to be configured via a "local-as" command which overrides the global as-number configured in "router bgp ". Also local-as ...
2
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0answers
19 views

How do I enforce preferential routes with BGP & Quagga?

I have two routers that I'm setting up currently and they will be feeding my network of servers with a private AS number provided by the datacentre. What I want to do is provide both a VRRP failover ...
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0answers
26 views

Solving an asymetric HA Firewall/router

I have an old Linux HA firewall/router setup that never quite worked. As it was never quite put into true production (just testing and demo's), I always had to have one firewall shutdown to make it ...
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0answers
162 views

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 ...
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0answers
109 views

Redundant Debian Gateway

I have to configure a redundant gateway with Debian boxes and I would like to get some recommendation what's the best solution in my case. There are certain limitations in my setup and I have to go ...
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0answers
140 views

Why an anycast server is so far away / slow? How does BGP anycast work?

I've tried doing a couple of traceroute tests to the DNS servers of Rage4, which are anycasted from many parts of the world (supposedly, from 30 different locations). What I've experienced is that ...
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0answers
144 views

Advertise iBGP learned routes to sub-AS confederation peer

I am having a difficult time figuring out one of the fundamental rules of iBGP, eBGP, and confederations. Consider the following routers which are all in the same Autonomous System (AS) r1 == r2 ...
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0answers
156 views

Cisco Router Failover Configuration

I am a unix admin that has been stuck in the position of configuring a Cisco 1921 for one of our offices. In that particular site we have two connections, an AT&T eVPN and a Sprint MPLS. The MPLS ...
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0answers
41 views

Source ip based Anycast-BGP?

I'm just getting interested in networking so don't be too harsh on me :) Ideal: 2 servers with shared ip; ip X Client 1 pings ip X > always server A Client 2 pings ip X > always server B ...
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0answers
76 views

How do I automatically advertise a preferred route via BGP using keepalived?

I have a dual firewall setup with 2 active paths to the internet. These are independent and cannot be linked together on the WAN side. It's part of a deployment at a datacentre. Each firewall has ...
0
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0answers
94 views

bgp and incomming requests

I have IP pool, 2 providers and BGP on RouterBoard. First provider is default. Second is backup. If first provider falls - outgoing connections works on second. But incoming still routed to broken ...