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4776 Views 8 Replies Latest reply: Oct 13, 2010 11:09 AM by hoangsinh RSS

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MPLS TE tunnel

Aug 12, 2010 10:15 AM

Karthik Kumar Thatikonda 5 posts since
Aug 23, 2008

Hello,

 

I trying to configure MPLS TE  on 6500's. I have a layer 3 port channel configured between two  switches. I am bundling two links. I had issues giving this command on a  layer 3 port channel (mpls traffic-eng tunnels). Do I need to use layer  2 port channel instead? That way it allowed me to enable that command  on SVI. I guess, we cannot configure TE tunnel between switches using  different interfaces such as layer 3 port channel. Any suggestions  please post.

 

 

 

Thanks,

Karthik

  • Scott Morris - CCDE/4xCCIE/2xJNCIE 8,429 posts since
    Oct 7, 2008
    Currently Being Moderated
    Re: MPLS TE tunnel

    Well, I have to admit that I have never tried to do that...  I'm going to have to wrangle me up a pair of 6500's not in a production network and do some playing around!

     

    My guess (completely off my head here) would be that you're asking the device to do something in software that normally would be ASIC supported and it's not really happy about that.  Which SUP were you using?  Which IOS were you using?

     

    I'd think it WOULD be possible, but perhaps in later IOS versions and/or newer SUPs?  Otherwise, I'd go with L2 LAGs and see what you can scare up that way.

     

    I found some docs talking about load balancing to 8 paths with the 3CBXL, but that appeared to be talking about LSPs, nothing specific yay or nay about LAGs.

     

    Scott

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  • Karthik Kumar Thatikonda 1 posts since
    Aug 13, 2010
    Currently Being Moderated
    Re: MPLS TE tunnel

    Thanks for the reply. I did configure layer 2 port channel and tunnel came up fine. I haven't researched about how to configure using layer 3 port channels.

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  • Scott Morris - CCDE/4xCCIE/2xJNCIE 8,429 posts since
    Oct 7, 2008
    Currently Being Moderated
    Re: MPLS TE tunnel

    Glad to hear it worked for you.   I asked a couple other folks about the L3 LAG and they hadn't heard about it, but like me, hadn't ever tried...     So I suspect there's a few of us who are going to lab it when we manage to find available equipment to mess around with! (grin)

     

    Scott

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  • Conwyn 9,683 posts since
    Sep 10, 2008
    Currently Being Moderated
    Re: MPLS TE tunnel

    Hi Scott

     

    TE is a subject of which I know nothing. I threw four routers together in GNS so I had two tunnels  using routers 1+2+4 and 1+3+4 using the ethernet ports on the 7200 and it worked quite happily but I was struggling to understand if that was L2 or L3 in the context of this posting.

     

    Regards Conwyn

     

    hostname R1
    ip cef
    mpls traffic-eng tunnels
    interface Loopback0
    ip address 1.1.1.1 255.255.255.255
    !
    interface Tunnel1
    ip unnumbered Loopback0
    tunnel destination 4.4.4.4
    tunnel mode mpls traffic-eng
    tunnel mpls traffic-eng autoroute announce
    tunnel mpls traffic-eng priority 1 1
    tunnel mpls traffic-eng bandwidth  1000
    tunnel mpls traffic-eng path-option 1 explicit identifier 1
      no routing dynamic
    !
    interface Tunnel2
    ip unnumbered Loopback0
    tunnel destination 4.4.4.4
    tunnel mode mpls traffic-eng
    tunnel mpls traffic-eng autoroute announce
    tunnel mpls traffic-eng priority 1 1
    tunnel mpls traffic-eng bandwidth  500
    tunnel mpls traffic-eng path-option 2 explicit identifier 2
    no routing dynamic
    !
    interface FastEthernet0/0
    ip address 10.0.0.1 255.255.255.252
    shutdown
    duplex auto
    speed auto
    mpls traffic-eng tunnels
    ip rsvp bandwidth 1000
    !
    interface FastEthernet0/1
    ip address 10.0.0.5 255.255.255.252
    duplex auto
    speed auto
    mpls traffic-eng tunnels
    ip rsvp bandwidth 1000
    !
    router ospf 1
    mpls traffic-eng router-id Loopback0
    mpls traffic-eng area 0
    log-adjacency-changes
    network 0.0.0.0 255.255.255.255 area 0


    ip explicit-path identifier 1 enable
    next-address 10.0.0.1
    next-address 10.0.0.9
    !
    ip explicit-path identifier 2 enable
    next-address 10.0.0.5
    next-address 10.0.0.13

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  • Scott Morris - CCDE/4xCCIE/2xJNCIE 8,429 posts since
    Oct 7, 2008
    Currently Being Moderated
    5. Aug 14, 2010 1:12 PM (in response to Conwyn)
    Re: MPLS TE tunnel

    You're looking for the "mpls traffic-engineering tunnels" command set.

     

    But more importantly (as you are doing L3 links there), it would be on line cards for a 6500 switch:

     

    interface fa1/1

    no switchport

    no ip address

    channel-group 1 mode on

     

    interface fa1/2

    no switchport

    no ip address

    channel-group 1 mode on

     

    interface port-channel 1

    ip address 10.10.10.1 255.255.255.0

    mpls ip

    mpls traffic-engineering tunnels

     

    and working from there..   That's the part he's having difficulty with is the L3 etherchannel AND the mpls TE command sets.  In GNS, I haven't used it enough to know whether or not it's possible to truly emulate a LAG connection between multiple interfaces or not.

     

    Scott

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  • Conwyn 9,683 posts since
    Sep 10, 2008
    Currently Being Moderated
    Re: MPLS TE tunnel

    Hi Scott

     

    Is this what you mean? Four 7200 in a line connected with two fastethernet in each port group

     

    Regards conwyn

     

    R1#show ip route
    Gateway of last resort is not set

         1.0.0.0/32 is subnetted, 1 subnets
    C       1.1.1.1 is directly connected, Loopback0
         2.0.0.0/32 is subnetted, 1 subnets
    O       2.2.2.2 [110/2] via 10.0.0.2, 00:00:16, Port-channel1
         3.0.0.0/32 is subnetted, 1 subnets
    O       3.3.3.3 [110/3] via 10.0.0.2, 00:00:16, Port-channel1
         4.0.0.0/32 is subnetted, 1 subnets
    O       4.4.4.4 [110/4] via 0.0.0.0, 00:00:16, Tunnel1
         10.0.0.0/30 is subnetted, 3 subnets
    O       10.0.0.8 [110/3] via 10.0.0.2, 00:00:16, Port-channel1
    C       10.0.0.0 is directly connected, Port-channel1
    O       10.0.0.4 [110/2] via 10.0.0.2, 00:00:16, Port-channel1
    R1#trace 4.4.4.4

    Type escape sequence to abort.
    Tracing the route to 4.4.4.4

      1 10.0.0.2 [MPLS: Label 16 Exp 0] 912 msec 608 msec 720 msec
      2 10.0.0.6 [MPLS: Label 16 Exp 0] 616 msec 648 msec 696 msec
      3 10.0.0.10 1012 msec 552 msec 616 msec

     

    service timestamps debug datetime msec
    service timestamps log datetime msec
    no service password-encryption
    !
    hostname R1

     

    ip cef
    !
    !
    mpls traffic-eng tunnels
    !
    interface Loopback0
    ip address 1.1.1.1 255.255.255.255
    !
    interface Tunnel1
    ip unnumbered Loopback0
    tunnel destination 4.4.4.4
    tunnel mode mpls traffic-eng
    tunnel mpls traffic-eng autoroute announce
    tunnel mpls traffic-eng priority 1 1
    tunnel mpls traffic-eng bandwidth  1000
    tunnel mpls traffic-eng path-option 1 explicit identifier 1
    no routing dynamic
    !
    interface Port-channel1
    ip address 10.0.0.1 255.255.255.252
    mpls traffic-eng tunnels
    hold-queue 150 in
    ip rsvp bandwidth 1000
    !
    interface FastEthernet0/0
    no ip address
    duplex auto
    speed auto
    channel-group 1
    !
    interface FastEthernet0/1
    no ip address
    duplex auto
    speed auto
    channel-group 1
    !
    interface FastEthernet1/0
    no ip address
    shutdown
    duplex auto
    speed auto
    !
    interface FastEthernet1/1
    no ip address
    shutdown
    duplex auto
    speed auto
    !
    router ospf 1
    mpls traffic-eng router-id Loopback0
    mpls traffic-eng area 0
    log-adjacency-changes
    network 0.0.0.0 255.255.255.255 area 0
    !
    !
    no ip http server
    no ip http secure-server
    !
    !
    ip explicit-path identifier 1 enable
    next-address 10.0.0.1
    next-address 10.0.0.5
    next-address 10.0.0.9
    !
    !
    !
    !

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  • Scott Morris - CCDE/4xCCIE/2xJNCIE 8,429 posts since
    Oct 7, 2008
    Currently Being Moderated
    7. Aug 15, 2010 5:11 AM (in response to Conwyn)
    Re: MPLS TE tunnel

    Yup, that would do.

     

    Now, we have a concept of it being completely possible. Although GNS is completely software, as is a 7200 anyway.  Whereas a 6500 is a handoff between software-controlled and ASIC-controlled.  Therein lies many of the difficulties in life. 

     

    But conceptually, that's correct.

     

    Scott

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  • hoangsinh 1 posts since
    Oct 13, 2010
    Currently Being Moderated
    Re: MPLS TE tunnel

    Hi Karthik

     

    Can you post your configuration for reference?

     

    What's IOS version you are using on 6500

     

    Cheer

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