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Forums » Internetwork Expert Products » CCIE R&S Lab Workbook Volume II Version 4.1 » IEWB-RS Volume 2 Version 4.1 Lab 18 » Task 5.3 - NLRI Advertisement
Latest post 01-05-2009 2:49 PM by snowell. 5 replies.
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  • 08-20-2008 7:31 AM

    • mlaporte
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    • Joined on 07-11-2008
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    Task 5.3 - NLRI Advertisement

    Reply Contact

    Hi,

    Why redistribute connected on R5? Is that to get the Eth0/0.1 and 0/0.2 in BGP as well?

    Marc
    Filed under:
    • Post Points: 20

  • 09-03-2008 1:14 AM In reply to

    • NTllect
    • Top 10 Contributor
    • Joined on 07-11-2008
    • CIS
    • Posts 269
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    Re: Task 5.3 - NLRI Advertisement

    Reply Contact
    I think yes, as well as for s0/1. But here comes the trick - R5 will relay this prefixes to BB2 and BB3 since it will receive 'em from R6, so 'red ei 10' under BGP should be ok. However, SG approach looks more confident.
    • Post Points: 20

  • 10-12-2008 6:28 PM In reply to

    • ndiayemalick
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    • Joined on 07-14-2008
    • Dakar, Senegal
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    Re: Task 5.3 - NLRI Advertisement

    Reply Contact

    Would redistribute eigrp 10 under BGP work on R5 and R6 ?

     
    • Post Points: 20

  • 10-17-2008 5:41 PM In reply to

    Re: Task 5.3 - NLRI Advertisement

    Reply Contact

    1.) Why is there a need to redistribute EIGRP into BGP on R5 and R6? Wouldnt a single redistribution on R5 is sufficient enough?

    2.) how does the ODR routes on R5 gets redistributed in BGP?

    I can see the ODR routes in R5 routing table, but after redistributed EIGRP and Connected into BGP on R5. There are no BGP routes for R4 E0/0 an E0/1.

    Rack1R5#sh ip route od
         156.1.0.0/16 is variably subnetted, 14 subnets, 2 masks
    o       156.1.4.0/24 [160/1] via 156.1.45.4, 00:00:50, Serial1/1
    o       156.1.44.0/24 [160/1] via 156.1.45.4, 00:00:50, Serial1/1
    o       156.1.109.0/24 [160/1] via 156.1.109.9, 00:00:21
         150.1.0.0/24 is subnetted, 8 subnets
    o       150.1.4.0 [160/1] via 156.1.45.4, 00:00:50, Serial1/1

     

    Rack1R5(config-router)#do sh ip bgp reg ^$
    BGP table version is 39, local router ID is 150.1.5.5
    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
    *> 54.1.1.0/24      156.1.35.3         5246976         32768 ?
    *> 150.1.1.0/24     156.1.35.3         5273600         32768 ?
    *> 150.1.2.0/24     156.1.35.3         4857856         32768 ?
    *> 150.1.3.0/24     156.1.35.3         2713600         32768 ?
    *> 150.1.5.0/24     0.0.0.0                  0         32768 ?
    *> 150.1.6.0/24     156.1.35.3         4862976         32768 ?
    *> 150.1.7.0/24     156.1.35.3         4860416         32768 ?
    *> 150.1.8.0/24     156.1.58.8          409600         32768 ?
    *> 156.1.3.0/24     156.1.35.3         2841600         32768 ?
    *> 156.1.8.0/24     156.1.58.8          284160         32768 ?
    *> 156.1.15.0/24    156.1.35.3         5145600         32768 ?
    *> 156.1.18.0/24    156.1.58.8          284160         32768 ?
    *> 156.1.23.0/24    156.1.35.3         4729856         32768 ?
    *> 156.1.27.0/24    156.1.35.3         4732416         32768 ?
    *> 156.1.35.0/24    0.0.0.0                  0         32768 ?
    *> 156.1.45.0/24    0.0.0.0                  0         32768 ?
    *> 156.1.45.4/32    0.0.0.0                  0         32768 ?
       Network          Next Hop            Metric LocPrf Weight Path
    *> 156.1.58.0/24    0.0.0.0                  0         32768 ?
    *> 156.1.67.0/24    156.1.35.3         4734976         32768 ?
    *> 192.10.1.0       0.0.0.0                  0         32768 ?
    *> 200.0.0.0        156.1.35.3         5374976         32768 ?
    *> 200.0.1.0        156.1.35.3         5374976         32768 ?
    *> 200.0.2.0        156.1.35.3         5374976         32768 ?
    *> 200.0.3.0        156.1.35.3         5374976         32768 ?
    *> 204.12.1.0       0.0.0.0                  0         32768 ?
    Rack1R5(config-router)#

    Rack1R5#sh ip bgp reg ^$ | i 156.1.4.0

    Rack1R5#sh ip bgp reg ^$ | i 156.1.44.0

    Rack1R5#

     

     

     
    • Post Points: 20

  • 12-23-2008 2:15 PM In reply to

    • skint
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    • Joined on 12-18-2008
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    Re: Task 5.3 - NLRI Advertisement

    Reply Contact

    The redistribution on R6 is what addresses the ODR routes.  They are passed from ODR -> EIGRP, meaning they cannot be passed to another routing protocol on that router without being passed back in from another protocol.  R6 sees the routes as EIGRP and redistributes with no issues.

     

    RSRack1R5#show ip b nei 204.12.1.254 adv | i 150.1.6.6
    r>i150.1.4.0/24     150.1.6.6        515076096    100      0 ?
    r>i156.1.4.0/24     150.1.6.6        515076096    100      0 ?
    r>i156.1.44.0/24    150.1.6.6        515076096    100      0 ?

    -skint
    • Post Points: 20

  • 01-05-2009 2:49 PM In reply to

    • snowell
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    • Joined on 11-22-2008
    • Raleigh, NC
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    Re: Task 5.3 - NLRI Advertisement

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    This solution produced full reachability:

    R6

    EIGRP - redistribute eigrp 10 (no route-map)

     

    R5

    BGP - redistribute connected (no route-map)

     

    Notice that I didnt execute a redistribution of EIGRP->BGP on R5.  I am at a loss to explain why its in the SG.

     

    -steve
    • Post Points: 5
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