BGP not advertised

I have two routers with BGP configured: 
C2921:
router bgp 65014
 bgp router-id 192.168.54.190
 bgp log-neighbor-change
 neighbor 192.168.54.150 remote-as 65011
 neighbor 192.168.54.150 description Loud backup
 neighbor 192.168.54.150 route-map Backup out
C1841:
router bgp 65011
 no synchronization
 bgp router-id 10.10.35.1
 bgp log-neighbor-changes
 neighbor 192.168.54.149 remote-as 65014
 neighbor 192.168.54.149 description Cubus backup
 neighbor 192.168.54.149 prefix-list Loudenia out
 neighbor 192.168.54.149 route-map Backup out
ip prefix-list Loudenia seq 5 permit 10.10.35.0/24 le 32
ip prefix-list Loudenia seq 10 permit 192.168.111.0/24 le 32
ip prefix-list Loudenia seq 15 permit 10.25.15.0/24 le 32
ip prefix-list Loudenia seq 20 permit 192.168.44.0/24 le 32
ip prefix-list Loudenia seq 25 permit 192.168.45.0/24 le 32
ip prefix-list Loudenia seq 30 permit 192.168.46.0/28 le 32
ip prefix-list Loudenia seq 35 permit 192.168.49.196/30 le 32
ip prefix-list Loudenia seq 40 permit 192.168.49.225/32
ip prefix-list Loudenia seq 45 permit 192.168.49.229/32
route-map Backup permit 10
 set as-path prepend 65011 65011
I have added:
ip prefix-list Loudenia seq 50 permit 192.168.48.225/32 
made:
clear ip bgp 192.168.54.149 soft
but nothing changed route to 192.168.48.225 not advertised:
C1841-Loudenia#show ip bgp neighbors 192.168.54.149 advertised-routes
BGP table version is 137998, local router ID is 10.10.35.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
   Network          Next Hop            Metric LocPrf Weight Path
*> 10.10.35.0/24    0.0.0.0                  0         32768 i
*> 10.25.15.0/24    192.168.111.10           0         32768 i
*> 192.168.44.0     192.168.49.26                          0 65005 i
*> 192.168.45.0     192.168.49.26                          0 65005 i
*> 192.168.46.0/28  192.168.49.26                          0 65005 i
*> 192.168.49.196/30
                    192.168.49.26                          0 65005 i
*> 192.168.49.225/32
                    192.168.49.26            0             0 65005 i
*> 192.168.49.229/32
                    192.168.49.26                          0 65005 i
*> 192.168.111.0    0.0.0.0                  0         32768 i
C1841 knows 192.168.48.225/32 via bgp 
*  192.168.48.225/32
                    192.168.49.58                          0 65005 65005 65005 65006 65013 i
*>                  192.168.49.26                          0 65005 65006 65013 i
I will be grateful for your advice

That is you mean?
C1841 knows 192.168.48.225/32 via bgp 
*  192.168.48.225/32
                    192.168.49.58                          0 65005 65005 65005 65006 65013 i
*>                  192.168.49.26                          0 65005 65006 65013 i

Similar Messages

  • BGP not advertising routes

    I have two routers with BGP configured: 
    C2921:
    router bgp 65014
     bgp router-id 192.168.54.190
     bgp log-neighbor-change
     neighbor 192.168.54.150 remote-as 65011
     neighbor 192.168.54.150 description Loud backup
     neighbor 192.168.54.150 route-map Backup out
    C1841:
    router bgp 65011
     no synchronization
     bgp router-id 10.10.35.1
     bgp log-neighbor-changes
     neighbor 192.168.54.149 remote-as 65014
     neighbor 192.168.54.149 description Cubus backup
     neighbor 192.168.54.149 prefix-list Loudenia out
     neighbor 192.168.54.149 route-map Backup out
    ip prefix-list Loudenia seq 5 permit 10.10.35.0/24 le 32
    ip prefix-list Loudenia seq 10 permit 192.168.111.0/24 le 32
    ip prefix-list Loudenia seq 15 permit 10.25.15.0/24 le 32
    ip prefix-list Loudenia seq 20 permit 192.168.44.0/24 le 32
    ip prefix-list Loudenia seq 25 permit 192.168.45.0/24 le 32
    ip prefix-list Loudenia seq 30 permit 192.168.46.0/28 le 32
    ip prefix-list Loudenia seq 35 permit 192.168.49.196/30 le 32
    ip prefix-list Loudenia seq 40 permit 192.168.49.225/32
    ip prefix-list Loudenia seq 45 permit 192.168.49.229/32
    route-map Backup permit 10
     set as-path prepend 65011 65011
    I have added:
    ip prefix-list Loudenia seq 50 permit 192.168.48.225/32 
    made:
    clear ip bgp 192.168.54.149 soft
    but nothing changed route to 192.168.48.225 not advertised:
    C1841-Loudenia#show ip bgp neighbors 192.168.54.149 advertised-routes
    BGP table version is 137998, local router ID is 10.10.35.1
    Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
                  r RIB-failure, S Stale
    Origin codes: i - IGP, e - EGP, ? - incomplete
       Network          Next Hop            Metric LocPrf Weight Path
    *> 10.10.35.0/24    0.0.0.0                  0         32768 i
    *> 10.25.15.0/24    192.168.111.10           0         32768 i
    *> 192.168.44.0     192.168.49.26                          0 65005 i
    *> 192.168.45.0     192.168.49.26                          0 65005 i
    *> 192.168.46.0/28  192.168.49.26                          0 65005 i
    *> 192.168.49.196/30
                        192.168.49.26                          0 65005 i
    *> 192.168.49.225/32
                        192.168.49.26            0             0 65005 i
    *> 192.168.49.229/32
                        192.168.49.26                          0 65005 i
    *> 192.168.111.0    0.0.0.0                  0         32768 i
    C1841 knows 192.168.48.225/32 via bgp 
    *  192.168.48.225/32
                        192.168.49.58                          0 65005 65005 65005 65006 65013 i
    *>                  192.168.49.26                          0 65005 65006 65013 i
    I will be grateful for your advice

    Hello, thanks for reply.
    The route is on the route table
    C1841-Loudenia#show ip route | i 192.168.48.225
    B       192.168.48.225/32 [20/0] via 192.168.49.26, 3w6d
    C1841-Loudenia#show ip bgp | i 192.168.48.225
    *  192.168.48.225/32
                        192.168.49.58                          0 65005 65005 65005 65006 65013 i
    *>                  192.168.49.26                          0 65005 65006 65013 i

  • BGP: Customer network announcing error (not advertised)

    Hi to all.
    Our company - is small business ISP. We have two BGP upstreams, and some customers who connect with us via BGP. Day ago, our customer opened a case that we don't announce his network to the "global network". I can see, that he announce me his network, and BGP add this prefix to the routing table. But when i open prefix detail - i see that prefix not advertised to any peer.
    Here is sh run :
    router bgp xxx
    bgp router-id xx.xx.xx.xx
    bgp log-neighbor-changes
    neighbor xx.xx.xx.xx remote-as xxxx
    neighbor xx.xx.xx.xx description Customer
    neighbor yy.yy.yy.yy remote-as yyyy
    neighbor yy.yy.yy.yy description Uplink
    address-family ipv4
      neighbor xx.xx.xx.xx activate
      neighbor xx.xx.xx.xx default-originate
      neighbor xx.xx.xx.xx soft-reconfiguration inbound
      neighbor xx.xx.xx.xx prefix-list DEFAULT out
      neighbor xx.xx.xx.xx prefix-list Deny-Default in
    neighbor yy.yy.yy.yy activate
      neighbor yy.yy.yy.yy prefix-list BizTel out
      neighbor yy.yy.yy.yy filter-list 1 out
    exit-address-family
    ip as-path access-list 1 permit ^$
    ip as-path access-list 1 permit ^xxxx$
    ip prefix-list DEFAULT seq 5 permit 0.0.0.0/0
    ip prefix-list Deny-Default seq 10 deny 0.0.0.0/32
    ip prefix-list Deny-Default seq 15 permit 0.0.0.0/0 le 32
    sh ip bgp neighbors xx.xx.xx.xx received-routes:
       Network          Next Hop            Metric LocPrf Weight Path
    *> 0.0.0.0          xx.xx.xx.xx                         0 xxxx xxxx yyyy i
    *> zz.zz.zz.zz/24    xx.xx.xx.xx           0             0 xxxx xxxx i
    sh ip bgp neigh xx.xx.xx.xx adv routes:
       Network          Next Hop            Metric LocPrf Weight Path
    *> 0.0.0.0          xx.xx.xx.xx                         0 xxxx xxxx yyyy i
    sh ip bgp  zz.zz.zz.zz /24:
    BGP routing table entry for zz.zz.zz.zz/24, version 6503140
    Paths: (3 available, best #1, table default)
      Not advertised to any peer
      xxxx xxxx, (received & used)
        xx.xx.xx.xx from xx.xx.xx.xx (cc.cc.cc.cc)
          Origin IGP, metric 0, localpref 100, valid, external, best
    Can somebody help me with this question?

    The outputs are very confusing ie.
    sh ip bgp neighbors xx.xx.xx.xx received-routes:
       Network          Next Hop            Metric LocPrf Weight Path
    *> 0.0.0.0          xx.xx.xx.xx                         0 xxxx xxxx yyyy i
    *> zz.zz.zz.zz/24    xx.xx.xx.xx           0             0 xxxx xxxx i
    presumably these are the routes received from the customer ?  If so -
    1) why are you receiving a default from the customer with yyyy in the AS PATH ?
    2) why are there two instances of xxxx in AS PATH for both routes in the AS PATH ?
    also -
    sh ip bgp neigh xx.xx.xx.xx adv routes:
       Network          Next Hop            Metric LocPrf Weight Path
    *> 0.0.0.0          xx.xx.xx.xx                         0 xxxx xxxx yyyy i
    if you are looking at routes advertised upstream why are you looking at advertised routes to the customer ?
    It is difficult to say what is happening because you have blanked out all the information.
    Finally you have -
    neighbor yy.yy.yy.yy prefix-list BizTel out
    but there is no such prefix list in the config you posted
    Can you clarify by answering the above and perhaps explain how this is all setup ie. is x.x.x.x the customer and y.y.y.y your upstream provider.
    The more information you can give the more we can help.
    Jon

  • Show ip bgp not showing all BGP Paths

    Hi,
    We've setup BGP as shown in the diagram.
    Now Router Router A and B are peers of each other. Router A peers with ISP A and Router B peers with Router B.
    The issue we have is that Router B knows how to get to router C via eBGP connection to ISP B router or via ISP A, which is advertised via iBGP from Router A.
    But ....
    Router A only shows in "show ip bgp" about network Router C via ISP A.
    If I do a soft clear of bgp information on Router A I then see both paths to Router C via ISP A or ISPB, but once BGP is converged im only seeing best path via ISP A. Can anyone explain why the path via ISP B is not shown on Router A? we are using local preference in a route map to say prefer router A over Router B to exit the network to get to router C.
    Synchronisation is disabled. Router A and B are running the same code of IOS and also have similiar configs.
    My assumption is that becuase of the local preference Router A stops listing path via Router B in the BGP table. This thought doesnt make complete sense to me ???? In my test lab I always see all paths to exit the AS.
    router#show ip bgp 192.168.100.0     
    BGP routing table entry for 192.168.100.0/22, version 40
    Paths: (2 available, best #2, table default)
      Not advertised to any peer
      65530 64514, (aggregated by 64514 10.x.x.246)
        10.x.x.30 from 10.x.x.30 (202.x.x.x)
          Origin IGP, localpref 80, valid, external, atomic-aggregate
      65530 64514, (aggregated by 64514 10.202.103.246)
        10.x.x.22 from 10.x.x.78 (10.x.x.78)
          Origin IGP, metric 0, localpref 120, valid, internal, atomic-aggregate, best
    Thanks
    B

    I've just lab'd this and it is the local preference.
    If I remove my route map I see all paths as expected. Once I apply my route-map which matches ips and assigns the local preference then I see the shown behaviour.
    Note to self - lab first before posting on cisco support forum

  • Sh bgp: received & advertised routes

    Dear all:
    In reference at the commands:
    - sh bgp neighbor A.B.C.D
    - sh bgp neighbor A.B.C.D received routes
    - sh bgp neighbor A.B.C.D advertised-routes
    For example:
    ROUTER#sh bgp neighbor A.B.C.D
      Policy for incoming advertisements is PEERING-IN
      Policy for outgoing advertisements is PEERING-OUT
      1 accepted prefixes, 0 are bestpaths
      Cumulative no. of prefixes denied: 8974070. 
        No policy: 0, Failed RT match: 0
        By ORF policy: 0, By policy: 8974070
      Prefix advertised 77, suppressed 0, withdrawn 2
    In output this command we have # Prefixes: 
    1 accepted & 0 are bestpaths (after policy) 
    advertised 77, suppressed 0, withdrawn 2 (after policy)
    8974070 prefix are deny
    But, when you execute the next command:
    ROUTER#sh bgp neighbor A.B.C.D received routes 
    Processed 503233 prefixes, 503233 paths
    In output this command we have# Prefixes = 503233 
    And when you execute the next command:
    ROUTER#sh bgp neighbor A.B.C.D advertised-routes
    Processed 73 prefixes, 73 paths
    In output this command we have:
    73 prefixes advertised at peer
    The question is:
    What's the different between  counter 8974070  and 503233 (prefix received before apply policy)?
    What's the different between  counter 77 (or 75 = 77 - 2 withdrawn) and  73 (prefix advertised before apply policy)?
    Exist only one command that help at see total prefix received/advertised (different a sh bgp neighbor A.B.C.D received routes) ?
    Thanks.

    Not really because OSPF does not advertise routes it sends LSAs to it's peers.
    So you need to look at the OSPF database ie. -
    "sh ip ospf database"
    which will show you all the LSAs the router is aware of.
    In terms of all the LSAs the router has received it will show all of those but it will also show you LSAs that were generated by the router itself although the advertising router IP will point to that being the case.
    In terms of all the LSAs the router advertises again it depends on the area and how that has been configured.
    So for example an ABR might well have external LSAs (which aren't tied to any area in the OSPF database) but that doesn't necessarily mean it is advertising them to peers within an area as it could have been configured not to.
    So it gives you a good idea but you need to also work out a few things for yourself as well.
    Jon

  • BGP route advertisement

    I am confused about which routes will a bgp speaker advertise to its bgp neighbors?
    Will it advertise the bgp routes in routing table OR will it advertise the best routes from the bgp table (but not necessarily in routing table)?

    Thanks!!
    I thought so, but in Troubleshooting IP Routing Protocols book by Cisco press, it is stated that bgp router will advertise its routes from routing table, so wanted to confirm that that was indeed wrong.
    On page 668, this is what is written:
    One rule that BGP follows when advertising prefixes to other neighbors is that the prefix being advertised must
    exist in the routing table of the advertising router.

  • BGP not communicating with 4th Hop

    Hi All,
    PFA...I'm beginner to BGP & designed network like in attachment.
    I'm unable to ping R5 from R1.
    R1:
    interface Serial1/0
     ip address 20.0.0.1 255.255.255.0
     serial restart-delay 0
    router bgp 200
     no synchronization
     bgp log-neighbor-changes
     network 20.0.0.0 mask 255.255.255.0
     network 20.0.2.0 mask 255.255.255.0
     network 20.0.2.0
     network 20.0.0.0 mask 20.0.0.0
     neighbor 20.0.0.2 remote-as 400
     neighbor 20.0.0.2 ebgp-multihop 255
     neighbor 20.0.2.2 remote-as 400
     neighbor 20.0.2.2 ebgp-multihop 255
    =====================================
    R2:
    interface Serial1/0
     ip address 30.0.0.1 255.255.255.0
     serial restart-delay 0
    router bgp 300
     bgp log-neighbor-changes
     neighbor 30.0.0.2 remote-as 400
     neighbor 30.0.0.2 ebgp-multihop 255
    =====================================
    R3:
    interface FastEthernet0/0
     ip address 40.0.0.1 255.255.255.0
     duplex auto
     speed auto
    interface Serial1/0
     ip address 20.0.0.2 255.255.255.0
     serial restart-delay 0
    interface Serial1/1
     ip address 30.0.0.2 255.255.255.0
     serial restart-delay 0
    interface Serial1/2
     ip address 20.0.1.1 255.255.255.0
     serial restart-delay 0
    interface Serial1/3
     ip address 30.0.1.1 255.255.255.0
     serial restart-delay 0
    router bgp 400
     no synchronization
     bgp log-neighbor-changes
     network 20.0.0.0 mask 255.255.255.0
     network 20.0.1.0 mask 255.255.255.0
     network 30.0.0.0 mask 255.255.255.0
     network 30.0.1.0 mask 255.255.255.0
     network 30.0.2.0 mask 255.255.255.0
     network 40.0.0.0 mask 255.255.255.0
     neighbor 20.0.0.1 remote-as 200
     neighbor 20.0.0.1 ebgp-multihop 255
     neighbor 20.0.1.2 remote-as 400
     neighbor 20.0.1.2 ebgp-multihop 255
     neighbor 30.0.0.1 remote-as 300
     neighbor 30.0.0.1 ebgp-multihop 255
     neighbor 30.0.1.2 remote-as 400
     neighbor 40.0.0.2 remote-as 400
    ======================================
    R4:
    interface Serial1/0
     ip address 20.0.1.2 255.255.255.0
     serial restart-delay 0
    interface Serial1/1
     ip address 20.0.2.1 255.255.255.0
     serial restart-delay 0
    interface Serial1/2
     ip address 20.0.3.1 255.255.255.0
     serial restart-delay 0
    interface Serial1/3
     no ip address
     shutdown
     serial restart-delay 0
    router bgp 400
     no synchronization
     bgp log-neighbor-changes
     network 20.0.0.0 mask 255.255.255.0
     network 20.0.1.0 mask 255.255.255.0
     network 20.0.2.0 mask 255.255.255.0
     network 20.0.3.0 mask 255.255.255.0
     neighbor 20.0.0.1 remote-as 200
     neighbor 20.0.0.1 ebgp-multihop 2
     neighbor 20.0.1.1 remote-as 400
     neighbor 20.0.1.1 ebgp-multihop 255
     neighbor 20.0.1.1 next-hop-self
     neighbor 20.0.2.2 remote-as 400
     neighbor 20.0.2.2 ebgp-multihop 255
     neighbor 20.0.3.2 remote-as 400
     neighbor 20.0.3.2 ebgp-multihop 255
    ======================================
    R5:
    interface Serial1/0
     ip address 20.0.2.2 255.255.255.0
     serial restart-delay 0
    interface Serial1/1
     ip address 30.0.2.2 255.255.255.0
     serial restart-delay 0
    router bgp 400
     no synchronization
     bgp log-neighbor-changes
     network 20.0.0.0 mask 255.255.255.0
     network 20.0.2.0 mask 255.255.255.0
     network 30.0.0.0 mask 255.255.255.0
     network 30.0.2.0 mask 255.255.255.0
     network 40.0.0.0 mask 255.255.255.0
     neighbor 20.0.0.1 remote-as 200
     neighbor 20.0.0.1 ebgp-multihop 255
     neighbor 20.0.2.1 remote-as 400
     neighbor 20.0.2.1 ebgp-multihop 255
     neighbor 30.0.2.1 remote-as 400
     neighbor 30.0.2.1 ebgp-multihop 255
    ======================================
    R6:
    interface Serial1/1
     ip address 30.0.1.2 255.255.255.0
     serial restart-delay 0
    interface Serial1/2
     ip address 20.0.3.2 255.255.255.0
     serial restart-delay 0
    interface Serial1/3
     ip address 30.0.3.1 255.255.255.0
     serial restart-delay 0
    router bgp 400
     no synchronization
     bgp log-neighbor-changes
     network 20.0.3.0 mask 255.255.255.0
     network 30.0.0.0 mask 255.255.255.0
     network 30.0.1.0 mask 255.255.255.0
     network 30.0.2.0 mask 255.255.255.0
     network 30.0.3.0 mask 255.255.255.0
     neighbor 20.0.3.1 remote-as 400
     neighbor 20.0.3.1 ebgp-multihop 255
     neighbor 30.0.0.1 remote-as 300
     neighbor 30.0.0.1 ebgp-multihop 255
     neighbor 30.0.1.1 remote-as 400
     neighbor 30.0.1.1 ebgp-multihop 255
     neighbor 30.0.2.2 remote-as 400
     neighbor 30.0.2.2 ebgp-multihop 255
     neighbor 30.0.3.2 remote-as 400
     neighbor 30.0.3.2 ebgp-multihop 255
    =====================================
    R7:
    interface FastEthernet0/0
     ip address 40.0.0.2 255.255.255.0
     duplex auto
     speed auto
    interface Serial1/3
     ip address 30.0.3.2 255.255.255.0
     serial restart-delay 0
    router bgp 400
     no synchronization
     bgp log-neighbor-changes
     network 30.0.3.0 mask 255.255.255.0
     network 40.0.0.0 mask 255.255.255.0
     neighbor 30.0.3.1 remote-as 400
     neighbor 40.0.0.1 remote-as 400
    =====================================
    Thanks.,
    Prakalathan.k

    Hi,
    there is one general BGP rule:
    A BGP router will not advertise any prefix received via iBGP to another iBGP neighbor.
    So neither R4 nor R6 will not advertise your R1 prefix received via iBGP to from R3 to another iBGP neighbor R5.
    There are several basic possibilities to fix the issue:
    a) Configure iBGP full-mesh.
    I.e., add a iBGP session between R5 and R3.
    b) Try to configure route-reflector.
    c) Or think about confederations.
    IMHO, a) is the easiest way.
    Best regards,
    Milan

  • What needs to be done to get the my primary network to not advertise?

    I've configured my Airport Extreme and Express (for extra range)  and created two networks.  The idea being one would be private and one guest (both require a security key).  I don't mind my guest advertising.  I'd like my private network to not advertise.  I'm about to add a second Airport Express as I need the extra range.  Since I'm going to need to configure that anyway, now would be the time to address the advertising issue around my private network - any suggestions?
    thanks

    I can understand why some Apple users want to "hide" their networks since Apple's default settings include the name of the user. For example.....
    John Smith's Wireless Network
    Personally, I could care less that my neighbors see the name of my network.......TWNDB.
    It is true that "hiding" the name of the network might keep a few honest neighbors from seeing the name of the network. But, those are probably not the guys that you need to worry about.
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