# BGP **URL:** https://forum.networklessons.com/c/routing-switching/bgp/10.md [Latest](https://forum.networklessons.com/latest.md) · [Categories](https://forum.networklessons.com/categories.md) --- ## [About the BGP category](https://forum.networklessons.com/t/about-the-bgp-category/16)
**Author:** [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\ **Replies:** 0\ **Last updated:** [December 13, 2016, 12:33pm UTC](https://forum.networklessons.com/t/about-the-bgp-category/16 "2016-12-13T12:33:21Z")
BGP (Border Gateway Protocol) is the routing protocol that we use on the Internet. We also use MP-BGP in MPLS VPN. Any BGP related questions can be discussed here. --- ## [MPLS Inter-AS Option B](https://forum.networklessons.com/t/mpls-inter-as-option-b/58842)
**Author:** [@davidilles](https://forum.networklessons.com/u/davidilles)\ **Replies:** 1\ **Last updated:** [September 20, 2026, 6:43am UTC](https://forum.networklessons.com/t/mpls-inter-as-option-b/58842 "2026-09-20T06:43:04Z")
Hello, Laz I have a slightly complicated question regarding inter-AS MPLS Option 2. When we configure the BGP VPNv4 session between the two ASBRs, why does the BGP next-hop need a /32 route for the next-hop in order fo… --- ## [BGP Paths Question](https://forum.networklessons.com/t/bgp-paths-question/17249)
**Author:** [@ccsmooth55](https://forum.networklessons.com/u/ccsmooth55)\ **Replies:** 8\ **Last updated:** [May 11, 2026, 8:58pm UTC](https://forum.networklessons.com/t/bgp-paths-question/17249 "2026-05-11T20:58:03Z")
Dear Forum, I am running a BGP lab in GNS3 and am noticing something unexpected. When I issue the “show ip bgp” command on the IOU1 router in AS500, I am only seeing 2 paths for the 200.77.189.0/24 network located in AS… --- ## [BGP and Route-Map](https://forum.networklessons.com/t/bgp-and-route-map/58756)
**Author:** [@speedosuper111](https://forum.networklessons.com/u/speedosuper111)\ **Replies:** 1\ **Last updated:** [December 11, 2025, 8:27am UTC](https://forum.networklessons.com/t/bgp-and-route-map/58756 "2025-12-11T08:27:16Z")
So I have to create route-reflector server on R3 and R4 as client so that the network of 10 get’s showing on R4. The issue started when I created a route-map on R3 with set ip next hop of R4 on out direction so that R4… --- ## [ASBR to BGP config](https://forum.networklessons.com/t/asbr-to-bgp-config/58718)
**Author:** [@gustavg\_96](https://forum.networklessons.com/u/gustavg_96)\ **Replies:** 1\ **Last updated:** [September 18, 2025, 4:27am UTC](https://forum.networklessons.com/t/asbr-to-bgp-config/58718 "2025-09-18T04:27:34Z")
Hi! I wanted to ask if anyone knows how the config is done when using OSPF and BGP together. For example if I have an OSPF Area 0 → ASBR → Internet do you run eBGP on the ASBR outgoing interface or do you need a dedicat… --- ## [How to limit as that are advertised to one neigbour BGP](https://forum.networklessons.com/t/how-to-limit-as-that-are-advertised-to-one-neigbour-bgp/53553)
**Author:** [@m.konieczna](https://forum.networklessons.com/u/m.konieczna)\ **Replies:** 1\ **Last updated:** [November 16, 2024, 6:10am UTC](https://forum.networklessons.com/t/how-to-limit-as-that-are-advertised-to-one-neigbour-bgp/53553 "2024-11-16T06:10:56Z")
Hi, In BGP configuration i want to advertise routes with one AS to FW. \*\> 10.0.0.0/24 10.10.1.1 0 0 0 65001 65101 65111 65150? Do someone know how to do it? Regards --- ## [WAN Internet services to Customer using ISP core](https://forum.networklessons.com/t/wan-internet-services-to-customer-using-isp-core/52228)
**Author:** [@macs6319](https://forum.networklessons.com/u/macs6319)\ **Replies:** 2\ **Last updated:** [October 16, 2024, 5:46am UTC](https://forum.networklessons.com/t/wan-internet-services-to-customer-using-isp-core/52228 "2024-10-16T05:46:16Z")
Hi Support Team, I have been working on a specific topology by demonstrating the ISP core backbone. I had attached the sample network topology for your reference. How are the Internet services provided to customers whe… --- ## [Mpbgp evpn](https://forum.networklessons.com/t/mpbgp-evpn/48369)
**Author:** [@Giovanni](https://forum.networklessons.com/u/Giovanni)\ **Replies:** 1\ **Last updated:** [June 5, 2024, 7:47am UTC](https://forum.networklessons.com/t/mpbgp-evpn/48369 "2024-06-05T07:47:25Z")
Hi Do you have lesson about MPBGP EVPN? I understood that this is needed for infrastructure network with VXLANS that has a completely different porpouse than traditional MPBGP . But can you share some example more de… --- ## [Segment routing V6](https://forum.networklessons.com/t/segment-routing-v6/48116)
**Author:** [@aronnericchiuto](https://forum.networklessons.com/u/aronnericchiuto)\ **Replies:** 1\ **Last updated:** [May 27, 2024, 5:35am UTC](https://forum.networklessons.com/t/segment-routing-v6/48116 "2024-05-27T05:35:28Z")
Dear all, I’m wondering if you’ll upload some lessons about Segment routing V6. It will soon replace the MPLS tecnology. Thanks you very much for all the lessons you’ve published till now Wish you a great day Aronne … --- ## [How looping is avoided in BGP routing?](https://forum.networklessons.com/t/how-looping-is-avoided-in-bgp-routing/47010)
**Author:** [@jadhav.tej](https://forum.networklessons.com/u/jadhav.tej)\ **Replies:** 1\ **Last updated:** [April 17, 2024, 8:58am UTC](https://forum.networklessons.com/t/how-looping-is-avoided-in-bgp-routing/47010 "2024-04-17T08:58:46Z")
Hi all . can someone please explain how looping is avoided in BGP routing ? which methods are used? Thank you --- ## [BGP Convergence Test (Link failure scenario)](https://forum.networklessons.com/t/bgp-convergence-test-link-failure-scenario/43689)
**Author:** [@vnwk05](https://forum.networklessons.com/u/vnwk05)\ **Replies:** 1\ **Last updated:** [February 26, 2024, 6:17am UTC](https://forum.networklessons.com/t/bgp-convergence-test-link-failure-scenario/43689 "2024-02-26T06:17:16Z")
Hi All, Need some help to Explain the BGP Convergence Test (Link Failure Scenario) with cisco xRV configuration. My scenario is i have 3 routers and connected R1 to R2 and R1 to R3, If R1 to R2 link goes down the traf… --- ## [Leaking specific BGP routes](https://forum.networklessons.com/t/leaking-specific-bgp-routes/41122)
**Author:** [@jbhosle](https://forum.networklessons.com/u/jbhosle)\ **Replies:** 2\ **Last updated:** [January 12, 2024, 12:44pm UTC](https://forum.networklessons.com/t/leaking-specific-bgp-routes/41122 "2024-01-12T12:44:19Z")
I apologize if this question is naive, but how can leaking specific routes influence incoming BGP traffic? --- ## [BGP Down in GRE VRF IPSEC VPN](https://forum.networklessons.com/t/bgp-down-in-gre-vrf-ipsec-vpn/39600)
**Author:** [@kensmithh95](https://forum.networklessons.com/u/kensmithh95)\ **Replies:** 5\ **Last updated:** [September 29, 2023, 6:18am UTC](https://forum.networklessons.com/t/bgp-down-in-gre-vrf-ipsec-vpn/39600 "2023-09-29T06:18:11Z")
Hello Community, I am having the following issue with a GRE over IPSEC tunnel. The syslogs from the router are indicating this: Aug 15 16:34:59.302: %SEC\_LOGIN-5-LOGIN\_SUCCESS: Login Success \[user: jadams\] \[Source: 10… --- ## [vCloud Director + HUB Router +eBGP + FLexVPN](https://forum.networklessons.com/t/vcloud-director-hub-router-ebgp-flexvpn/36979)
**Author:** [@hlconsulting](https://forum.networklessons.com/u/hlconsulting)\ **Replies:** 1\ **Last updated:** [May 27, 2023, 5:21am UTC](https://forum.networklessons.com/t/vcloud-director-hub-router-ebgp-flexvpn/36979 "2023-05-27T05:21:43Z")
Hello colleagues. I need your help. I have vCloud Director (hereinafter vcd), it is a cloud chode based on IaaS, inside I have Cisco C8000V (hub router), in the vcd itself there are local networks rfc1918, for hub route… --- ## [ECMP and load balancing](https://forum.networklessons.com/t/ecmp-and-load-balancing/34645)
**Author:** [@asafonov](https://forum.networklessons.com/u/asafonov)\ **Replies:** 2\ **Last updated:** [February 21, 2023, 7:09am UTC](https://forum.networklessons.com/t/ecmp-and-load-balancing/34645 "2023-02-21T07:09:06Z")
Hi , I’m stuck with a very weird problem. So I have R1 (AS1) conneced to R2 and R3 (both in AS2 and connected between each other). No problems with ECMP on R1. But I want load balancing from R2/R3 as well so valid path t… --- ## [Loopback not advertising on R4 from R1](https://forum.networklessons.com/t/loopback-not-advertising-on-r4-from-r1/25394)
**Author:** [@salman.saloo93](https://forum.networklessons.com/u/salman.saloo93)\ **Replies:** 1\ **Last updated:** [March 28, 2022, 4:12am UTC](https://forum.networklessons.com/t/loopback-not-advertising-on-r4-from-r1/25394 "2022-03-28T04:12:08Z")
Hey guys, I am currently doing lab with 4 Routers Note: all routers are having same AS number 100 R1 : Loopback 1.1.1.1 R2: Loopback 2.2.2.2 R3: Loopback 3.3.3.3 R4: Loopback 4.4.4.4 So after doing configuration and… --- ## [BGP Configuration ASA - Understanding BGP Route format](https://forum.networklessons.com/t/bgp-configuration-asa-understanding-bgp-route-format/15939)
**Author:** [@sachinites](https://forum.networklessons.com/u/sachinites)\ **Replies:** 1\ **Last updated:** [December 14, 2021, 7:38am UTC](https://forum.networklessons.com/t/bgp-configuration-asa-understanding-bgp-route-format/15939 "2021-12-14T07:38:13Z")
I have cisco ASA based topology as follows : ASA1-7.7.7.3/24---------bgp--------7.7.7.4/24–ASA2 Its is a bgp protocol running and two ASAs are connected via direct link in subnet 7.7.7.0/24 . ASA2-bgp advertise 0/0 net… --- ## [Remove As-path on advertisement](https://forum.networklessons.com/t/remove-as-path-on-advertisement/14891)
**Author:** [@rmkumar666](https://forum.networklessons.com/u/rmkumar666)\ **Replies:** 3\ **Last updated:** [October 24, 2022, 3:47am UTC](https://forum.networklessons.com/t/remove-as-path-on-advertisement/14891 "2022-10-24T03:47:37Z")
Hi Guys, I have a requirement to remove or trim as-path on the advertisement, can some one pls help. We have 2 different bgp peering, both receives the same routes with lesser and longer as-path. I have use the longer … --- ## [EBGP not have advertises network to ibgp](https://forum.networklessons.com/t/ebgp-not-have-advertises-network-to-ibgp/31380)
**Author:** [@donho1987](https://forum.networklessons.com/u/donho1987)\ **Replies:** 6\ **Last updated:** [October 22, 2022, 9:38pm UTC](https://forum.networklessons.com/t/ebgp-not-have-advertises-network-to-ibgp/31380 "2022-10-22T21:38:31Z")
I try to setup a control panel for BGP 300 and the data plane with private BGP 70000, i have ar01 configured as a router reflector, pr01 as a client, and net-hop-self to ar01 device, i configure is-is from ar01 to csw ro… --- ## [EVPN Network Topic](https://forum.networklessons.com/t/evpn-network-topic/7128)
**Author:** [@vijaysiva](https://forum.networklessons.com/u/vijaysiva)\ **Replies:** 2\ **Last updated:** [October 3, 2022, 6:54pm UTC](https://forum.networklessons.com/t/evpn-network-topic/7128 "2022-10-03T18:54:36Z")
If you can publish study material for EVPN/ VXLAN for spine and leaf architecture that will be great. --- ## [BGP route not learned](https://forum.networklessons.com/t/bgp-route-not-learned/30633)
**Author:** [@gurowar](https://forum.networklessons.com/u/gurowar)\ **Replies:** 2\ **Last updated:** [September 20, 2022, 5:45pm UTC](https://forum.networklessons.com/t/bgp-route-not-learned/30633 "2022-09-20T17:45:19Z")
Hi I have a quick question I was checking my BGP config to see why my peer router wasn’t learning a particular route. On my router I can see that I am advertising it and that the route is valid and active se7wancsw2014… --- ## [BGP and EIGRP redistribution question](https://forum.networklessons.com/t/bgp-and-eigrp-redistribution-question/30587)
**Author:** [@ncc99999](https://forum.networklessons.com/u/ncc99999)\ **Replies:** 1\ **Last updated:** [September 17, 2022, 6:28am UTC](https://forum.networklessons.com/t/bgp-and-eigrp-redistribution-question/30587 "2022-09-17T06:28:59Z")
Hi Everyone, On my production router, I have this setup: prod\_router#sh run | Sec router router eigrp PROD ! address-family ipv4 unicast autonomous-system 101 ! topology base redistribute connected redistri… --- ## [Primary & Backup DCs for Spoke Site - BGP](https://forum.networklessons.com/t/primary-backup-dcs-for-spoke-site-bgp/28641)
**Author:** [@voletiraghuram](https://forum.networklessons.com/u/voletiraghuram)\ **Replies:** 1\ **Last updated:** [July 26, 2022, 5:08am UTC](https://forum.networklessons.com/t/primary-backup-dcs-for-spoke-site-bgp/28641 "2022-07-26T05:08:52Z")
Hello Rane, How to manipulate path in BGP so that Spoke site always connects to DC1 as primary & DC2 as backup. Where DC1 & DC2 are both connected to different ISPs. --- ## [Unstable BGP & BFDB?](https://forum.networklessons.com/t/unstable-bgp-bfdb/27772)
**Author:** [@ibmufa](https://forum.networklessons.com/u/ibmufa)\ **Replies:** 3\ **Last updated:** [July 26, 2022, 5:00am UTC](https://forum.networklessons.com/t/unstable-bgp-bfdb/27772 "2022-07-26T05:00:41Z")
I work in a NOC. Had a customer reporting unstable BGP adjacency. The logs certaily suggested BG was unstable? But when we checked the PE, there were no events showing BGP ever bounced. Only time we saw BGP go down w… --- ## [What does BGP acceptedPrefixCounter mean?](https://forum.networklessons.com/t/what-does-bgp-acceptedprefixcounter-mean/27763)
**Author:** [@atech5122](https://forum.networklessons.com/u/atech5122)\ **Replies:** 1\ **Last updated:** [June 18, 2022, 5:49am UTC](https://forum.networklessons.com/t/what-does-bgp-acceptedprefixcounter-mean/27763 "2022-06-18T05:49:00Z")
Hi I’m working on a project with BGP and I’ve seen this “acceptedPrefixCounter”: 0 appear sometimes. I’m curious to know what that means because I’ve searched everywhere on the net and haven’t found anything. --- ## [BGP - Route-Map - Prefix-List](https://forum.networklessons.com/t/bgp-route-map-prefix-list/25839)
**Author:** [@beacht](https://forum.networklessons.com/u/beacht)\ **Replies:** 1\ **Last updated:** [April 8, 2022, 4:47am UTC](https://forum.networklessons.com/t/bgp-route-map-prefix-list/25839 "2022-04-08T04:47:27Z")
Hi I’m playing about with route-maps and prefix-list and assigning the route-map to my BGP configuration in my lab. I have aggregate address of 172.129.0.0/17 and i would like advertise routes that are greater than /24 … --- ## [Redistributing OSPF default route into BGP](https://forum.networklessons.com/t/redistributing-ospf-default-route-into-bgp/25173)
**Author:** [@dan](https://forum.networklessons.com/u/dan)\ **Replies:** 1\ **Last updated:** [March 19, 2022, 6:18am UTC](https://forum.networklessons.com/t/redistributing-ospf-default-route-into-bgp/25173 "2022-03-19T06:18:45Z")
Hello, I’m working with a 5-office WAN and all sites are using BGP to exchange routing information. At the Main site and the DR site, I have firewalls that don’t run BGP so I’m using OSPF on those. The firewalls are c… --- ## [BGP Routing Return path](https://forum.networklessons.com/t/bgp-routing-return-path/17517)
**Author:** [@stamati76](https://forum.networklessons.com/u/stamati76)\ **Replies:** 4\ **Last updated:** [February 14, 2022, 9:16am UTC](https://forum.networklessons.com/t/bgp-routing-return-path/17517 "2022-02-14T09:16:43Z")
Hi All, Firstly, thanks for taking the time to read this, i hope you can help! I have drawn my network topology and would like to know what would be the best way to change the routing so that traffic uses the return pa… --- ## [ISP and Costumer BGP advertisements](https://forum.networklessons.com/t/isp-and-costumer-bgp-advertisements/15873)
**Author:** [@Jhojansy.guzman](https://forum.networklessons.com/u/Jhojansy.guzman)\ **Replies:** 1\ **Last updated:** [December 3, 2021, 6:41am UTC](https://forum.networklessons.com/t/isp-and-costumer-bgp-advertisements/15873 "2021-12-03T06:41:15Z")
Hi there: While studying BGP, a doubt came up , on weather in production environment the ISP would advertise its internal(IBGP) networks to an EBGP neighbor. The fact that only the edge router(R3) can ping advertised ne… --- ## [AS-PATH Prepending vs PBR for eBGP topology](https://forum.networklessons.com/t/as-path-prepending-vs-pbr-for-ebgp-topology/15815)
**Author:** [@donphila20061](https://forum.networklessons.com/u/donphila20061)\ **Replies:** 5\ **Last updated:** [December 3, 2021, 6:00am UTC](https://forum.networklessons.com/t/as-path-prepending-vs-pbr-for-ebgp-topology/15815 "2021-12-03T06:00:56Z")
Hi guys. I have a very important question regarding a bgp design. I created this enterprise BGP design between a site and two DCs. Site AS:65028 is the remote and has two ISP connections to DC A via Lumen as primary and… [Next page](https://forum.networklessons.com/c/routing-switching/bgp/10.md?page=1)