mpls supporting ios

what exact 12.3 IOS should i use to configure MPLS VPN on 2600xm??

Comments

  • Get 12.3 enterprise plus or something like that. You can use the Cisco FN to find a suitable version. www.cisco.com/go/fn - However the FN does not say that 2610XM is supported.

  • Sorry for typo:

    This is the filename

    c2600-adventerprisek9-mz.123-24.bin

     

    [:D]

  • 12.3(26) Advanced Enterprise Services.

     

    Brian McGahan, CCIE #8593 (R&S/SP/Security)
    [email protected]
     
    Internetwork Expert, Inc.
    http://www.INE.com
    Online Community: http://www.IEOC.com
    CCIE Blog: http://blog.INE.com

     

    From: [email protected] [mailto:[email protected]] On Behalf Of ssfouzdar.ie
    Sent: Saturday, August 20, 2011 3:18 PM
    To: Brian McGahan
    Subject: [CCIE R&S] mpls supporting ios

     

    what exact 12.3 IOS should i use to configure MPLS VPN on 2600xm??




    INE - The Industry Leader in CCIE Preparation
    http://www.INE.com

    Subscription information may be found at:
    http://www.ieoc.com/forums/ForumSubscriptions.aspx

  • Brian et All,

    Can you tell me starting from which IOS ver; "no bgp default ipv4-unicast" command is not required.

    I checked in Version 12.4(12) and found that its not needed. I mean when we dont put this command ; "address-family ipv4" is not automatically configured.

    Would appreciate if you can put some additional light on this command.

    Merci Beacoup

    Ashish

     

  • I don't know why you are saying no bgp default ipv4-unicast is not needed after 12.4(12).By default ipv4-unicast enabled means when you configure:

    neighbor x.x.x.x remote-as <x>

    neighbor <x.x.x.x> update-source <xx> command it initiates the unicast BGP neighbor session (not vpnv4) by default.

    see here:

    I am working on this version:

    Cisco IOS Software, 3700 Software (C3725-ADVENTERPRISEK9-M), Version 12.4(15)T7, RELEASE SOFTWARE (fc3)

    R2#show running-config | section router bgp
    router bgp 1
     no synchronization
     bgp log-neighbor-changes
     neighbor 1.1.1.1 remote-as 1
     neighbor 1.1.1.1 update-source Loopback0
     no auto-summary
     !
     address-family vpnv4
      neighbor 1.1.1.1 activate
      neighbor 1.1.1.1 send-community extended
     exit-address-family

    R2#show ip bgp all summary
    For address family: IPv4 Unicast
    BGP router identifier 2.2.2.2, local AS number 1
    BGP table version is 1, main routing table version 1

    Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
    1.1.1.1         4     1      12      12        1    0    0 00:04:06        0

    For address family: VPNv4 Unicast
    BGP router identifier 2.2.2.2, local AS number 1
    BGP table version is 1, main routing table version 1

    Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
    1.1.1.1         4     1      12      12        1    0    0 00:04:06        0
    R2#

    You noticed, there is vpnv4 and unicast BGP session with neighbor 1.1.1.1. If you want only vpnv4 BGP session rather than unicast use no bgp default ipv4-unicast command. See example:

    R2#show ip bgp all summary
    For address family: VPNv4 Unicast
    BGP router identifier 2.2.2.2, local AS number 1
    BGP table version is 1, main routing table version 1

    Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
    1.1.1.1         4     1      23      23        0    0    0 00:00:18        0

    Now we have only VPNv4 BGP session.

    I worked with Cisco IOS Software, 7200 Software (C7200-ADVENTERPRISEK9-M), Version 15.0(1)M, RELEASE SOFTWARE (fc2) version and got same result, by default BGP inititates the unicast BGP session.

    R2#show ip bgp all summary
    For address family: IPv4 Unicast
    BGP router identifier 2.2.2.2, local AS number 1
    BGP table version is 1, main routing table version 1

    Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
    1.1.1.1         4            1       6       5        1    0    0 00:01:50        0

    For address family: VPNv4 Unicast
    BGP router identifier 2.2.2.2, local AS number 1
    BGP table version is 1, main routing table version 1

    Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
    1.1.1.1         4            1       6       5        1    0    0 00:01:50        0

    [:D]

  • nnn,

    Update-source has nothing to do with default ipv4-unicast. It simply means that we will send IPv4 prefixes by default. A reason for turning this off would be that you have setup IPv6 BGP peering and don't want to send the IPv4 prefixes to the peer only IPv6.

    I have not heard that this behaviour has changed but you could try it by setting up IPv6 peering and see if the IPv4 prefixes are exchanged as well.

  • Yes I was just simulating the example using update-source. That is not related with ipv4-unicast.

     

  • This is because, by default you only negotiate IPv4 unicast NLRI exchange; however if you enable vpnv4 or ipv6 in BGP, you will see that also "address-family ipv4" is added in there. So by default, having address-family ipv4 activated, does not mean it show up as "address-family ipv4" in "show run"

    Good luck with your studies!

Sign In or Register to comment.