Questions tagged [bgp]

BGP is Border Gateway Protocol, used on the internet both inside of and in between networks.

25 questions with no upvoted or accepted answers
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316 views

BGP - source routing breaking for some routes

I have two routers (A and B), both are Juniper j2320s. Each one has 3 BGP peers, a primary to one preferred AS (call them AS 1) and two to a secondary (AS 2), as well as an IBGP session between them. ...
3
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4answers
155 views

Cisco N9K - Down an interface in response to another interface going down?

I currently have my transit providers plugged directly into my router. I really like this arrangement because when the ISP goes down this typically downs the interfaces which results in BGP peering ...
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0answers
23 views

Problem with bgp aggregate-address behavior in iOS when a large number of OSPF routes update all at once

We have a direct connect setup to AWS using BGP. We are running a ISR4451 with IOS XE 16.03.06. I have a strange situation where the AWS BGP neighbor drops our connection with the notification: ...
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0answers
256 views

How to redistribute BGP routes learned from AWS in one VR into another BGP running in another VR in Palo Alto firewall?

I have about 1000+ prefixes I am learning from AWS on Palo Alto through a BGP. This is on the secondary VR. Main VR is where my core routing is situated along with another BGP instance pointing to ...
2
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0answers
67 views

Method to rename the existing BGP peer group

In Cisco ASR router, do we have any method to rename the existing peer group without removing and recreating it?
2
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0answers
324 views

ip routing preference problem

On my Huawei CE12800 device, I am trying to run this config. Beside a standart BGP process, I am using three community values to control traffic with my upstream provider. With 555 community value, I ...
2
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0answers
448 views

Is there any way to view the current queue size for a BGP neighbor in the Bird routing daemon?

Using a Cisco or Juniper routers you can see the size of the output queue value by showing the bgp summary. This information is also available when showing the detailed neighbor information. e.g. ...
2
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0answers
7k views

Setup the BGP + ospf network

I've the next Lab with GNS3 I have two autonomous systems(100,200), when the AS 100 run a OSPF with two areas, 0 and 1. The AS 200 has only a router and computer, so easy. But I don't know how to ...
2
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3answers
544 views

Active\Passive Routers w\ BGP

What I'm trying to do is take two routers, "A" and "B" where 'A' is the primary router. Just like with active\passive firewalls and HSRP I want to "float" the default gateway between either Router A ...
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0answers
29 views

Redirect Junos IP public -> IP private

we have an MX204 here that works as our BGP, border router and it is gateway of a service that has private IP, I need to access this service with private IP outside our network, you can tell me if I ...
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0answers
377 views

VXLAN working over IGP, but no NVE peers or EVPN routes in BGP

I'm an absolute beginner with NX-OS and VXLAN. I'm trying to set up a very simple configuration for VXLAN/EVPN/BGP. I have one NX-OSv spine and two leaf switches. No VPC, no anycast SVI. The ...
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0answers
135 views

Getting VRF to work (and some other questions)

I'm messing with BGP/MPLS for the first time and I have some doubts both in if I'm doing something wrong with my configuration and if it is the best approach, hope you guys can clarify me a bit here. ...
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0answers
113 views

EVPN+VxLAN strange silent host issue

EVPN+VxLAN very strange silent host issue I have very basic EVPN+VxLAN design where i used OSPF/Multicast/BGP/vPC technologies to build small size datacenter. L2VNI working great without any issue. I ...
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0answers
58 views

In Bgp TTL security all control packets will have configured hop value?

Topology: loop(2.1.1.1) - routerA (192.168.1.2)--------- (192.168.1.1) routerB - loop(1.1.1.1) I have eBGP peering configured with a Multihop of 2 on both sides and static routes to reach loopbacks. ...
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0answers
15 views

Can BGP-LS provide an ip address as a node attribute when distributing IS-IS

I have an IS-IS network (all cisco) with a BGP router (cisco) that I am using to distribute the network link-state for monitoring / analysis. one thing I would like is to receive an IP address for ...
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0answers
53 views

Is there a way to check which routes are matched by a term in a routing map?

I have created a prefix-list and I am using it in a route-map. However, my route-map is not working as I expect it to work. ip prefix-list LIST_A seq 5 permit 10.20.20.0/22 ge 32 route-map A-B-OUT ...
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0answers
411 views

Problem configuring L3VPN with MPLS, RSVP-TE, VLAN

We are having problems to configure a L3VPN in VIRL with an MPLS CORE NETWORK that uses RSVP-TE as label exchange protocol and IS-IS as IGP protocol. The idea is to distinguish different type of ...
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0answers
454 views

Regarding BGP redistribution basics

I have 2 routers R1 and R2 connected back to back. R1 and R2 are ebgp neighbors for address family ipv4 and address family vpnv4. I want to test the following: --Redistribute a route from R2's global ...
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0answers
837 views

Quagga BGP failover

I'm using Quagga + BGP with Racoon IPSec to connect to AWS VPN tunnel. AWS provides 2 tunnels for redundancy. Everything is working with fine with Asymmetric routing in place. To test failover, I ...
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0answers
698 views

Best way to join VRFs using BGP when VRFs are on same PE

I have a Firewall that I need to use to join two different VRFs on service provider PEs. The EGP of choice is BGP. I have done a number of tests with different techniques, I have found two solutions ...
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42 views

Any benefit if advertise /24 between my ASs that connect through eBGP using private ASs?

Let's say I'm migrating my network to new infrastructure. So, the new site and the old site are connected using private ASs. I wonder if there is any benefit for the new site to advertise /24 along ...
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670 views

BGP transitive attributes for single ASN multiple prefixes multiple neighbors

I believe I'm on the right track, but have stumble across something with advertising BGP prefixes to neighbors. I am wonder how if I have a single ASN with multiple prefixes (99.1.1.0/24 and 111.1.1.0/...
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0answers
686 views

MPLS L3 VPNs and F5 Route Domains

I realize the F5 community might be the right place for this question, but this concerns routing design as opposed to an ADC design. We are planning to use F5's CGNAT module for NAT'ing our campus ...
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36 views

iBGP Question reagrding Distribute - List from EIGRP

So, I have the following topology. A-B | | C-D A-B-C-D are Routers. It doesn't matter what are the IP's of the interfaces. What matters is that I have 2 loopbacks for each router. 1.1.1.1 and 11.11....
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2answers
398 views

IGP between 2 routers with an uncooperative router in the middle

I've got two routers, A and B. A gets some routes over BGP over a VPN connection, and has a leg on 10.0.0.0/24. It also can access the whole 10.0.0.0/16 via its default gateway. B is on 192.168.0.0/...