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Latest post 11-19-2008 9:14 AM by shivalao. 4 replies.
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  • 11-18-2008 1:20 PM

    • shivalao
    • Top 500 Contributor
    • Joined on 10-02-2008
    • Posts 6
    • Points 105

    lab 8 section 3.7 eigrp unequal load balancing

    Hi can you please help me out with this, I am terribly stuck. I read ver 5.0 on this but still I could not configure this.

    This is what I am currently having in my config:

    Ethernet side between R4 and R6: cost is 110usec

    R4 > R1 is 20000us and R1>R6 is 10usec (feasible successor)

    Total on the frame side is 200020.

    Any idea to arrive to w/book values?

    Thanks

    • Post Points: 20
  • 11-18-2008 5:59 PM In reply to

    Re: lab 8 section 3.7 eigrp unequal load balancing

    Post the output from the routing table and the eigrp topology.

    Brian McGahan, CCIE #8593 (R&S/SP/Security)
    bmcgahan@internetworkexpert.com
     
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    shivalao wrote:

    Hi can you please help me out with this, I am terribly stuck. I read ver 5.0 on this but still I could not configure this.

    This is what I am currently having in my config:

    Ethernet side between R4 and R6: cost is 110usec

    R4 > R1 is 20000us and R1>R6 is 10usec (feasible successor)

    Total on the frame side is 200020.

    Any idea to arrive to w/book values?

    Thanks




    Internetwork Expert - The Industry Leader in CCIE Preparation
    http://www.internetworkexpert.com

    Subscription information may be found at:
    http://www.ieoc.com/forums/ForumSubscriptions.aspx
    • Post Points: 20
  • 11-18-2008 6:21 PM In reply to

    • shivalao
    • Top 500 Contributor
    • Joined on 10-02-2008
    • Posts 6
    • Points 105

    Re: lab 8 section 3.7 eigrp unequal load balancing

    Please find below the result of routing and topology table. Thanks.

     

    Rack2R4(config-router)#do sh ip route 192.10.2.0
    Routing entry for 192.10.2.0/24
      Known via "eigrp 1024", distance 170, metric 2560002816, type external
      Redistributing via eigrp 1024
      Last update from 174.2.45.5 on FastEthernet0/1, 00:00:07 ago
      Routing Descriptor Blocks:
      * 174.2.45.5, from 174.2.45.5, 00:00:07 ago, via FastEthernet0/1
          Route metric is 2560002816, traffic share count is 1
          Total delay is 110 microseconds, minimum bandwidth is 1 Kbit
          Reliability 1/255, minimum MTU 1 bytes
          Loading 1/255, Hops 1

     

    Rack2R4(config-router)#do sh ip eig top 192.10.2.0
    IP-EIGRP (AS 1024): Topology entry for 192.10.2.0/24
      State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2560002816
      Routing Descriptor Blocks:
      174.2.45.5 (FastEthernet0/1), from 174.2.45.5, Send flag is 0x0
          Composite metric is (2560002816/2560000256), Route is External
          Vector metric:
            Minimum bandwidth is 1 Kbit
            Total delay is 110 microseconds
            Reliability is 1/255
            Load is 1/255
            Minimum MTU is 1
            Hop count is 1
          External data:
            Originating router is 150.2.5.5 
            AS number of route is 0
            External protocol is RIP, external metric is 0
            Administrator tag is 0 (0x00000000)
      174.2.145.1 (Serial0/0), from 174.2.145.1, Send flag is 0x0
          Composite metric is (2560512512/2560000512), Route is External
          Vector metric:
            Minimum bandwidth is 1 Kbit
            Total delay is 20020 microseconds
            Reliability is 1/255
            Load is 1/255
            Minimum MTU is 1
            Hop count is 2
          External data:
            Originating router is 150.2.5.5 
            AS number of route is 0
            External protocol is RIP, external metric is 0
            Administrator tag is 0 (0x00000000)

    • Post Points: 20
  • 11-18-2008 7:24 PM In reply to

    • apd123
    • Top 25 Contributor
    • Joined on 07-26-2008
    • Posts 94
    • Points 1,165

    Re: lab 8 section 3.7 eigrp unequal load balancing

    Composite metric is (2560002816/2560000256), Route is External
    Composite metric is (2560512512/2560000512), Route is External


    2560002816>2560000512
    So the feasibility condition should be met.  Do you have the "variance" command configured under the eigrp process?  Also in a lab setting I would exit config mode and try a clear ip eigrp nei just to make sure the changes are updated although this should not be needed.  Below I have posted an alternative way of solving these EIGRP problems without adjusting K values or interface metrics.  This approach allows you to be more granular as you can match more specific routes such as below where routes are modified for two neighbors on the same incoming interface.

    This is on V2 Lab 1 topology you should probably pull up the diagrams for this to make sense.  Router 2 is a hub while routers 1 and 3 are spokes and have EIGRP adjacencies with R2.  I was able to load balance routes from R1 & R3 on R2 in a 4:1 distribution by matching the route-source, setting the delay to 10ms and then modifying the bandwidth such that R1's was 4 times as great.  Note that the bandwidth setting in EIGRP is the minimum bandwidth for the path so I could only set it between 1 and 1544 in this example, 1544 being the previous minimum bandwidth of the serial interfaces.

    Rack1R2#
    router eigrp 100
     variance 128
     distribute-list route-map TEST in
    !
    route-map TEST permit 10
     match ip route-source 1
     set metric 1000 1 1 1 1
    !
    route-map TEST permit 20
     match ip route-source 3
     set metric 250 1 1 1 1
    !
    access-list 1 permit 183.1.123.1
    access-list 3 permit 183.1.123.3
    !
    Rack1R2#
    Routing entry for 183.1.45.0/24
      Known via "eigrp 100", distance 170, metric 2560256
      Tag 3110, type external
      Redistributing via eigrp 100
      Last update from 183.1.123.3 on Serial0/0, 01:25:08 ago
      Routing Descriptor Blocks:
        183.1.123.3, from 183.1.123.3, 01:25:08 ago, via Serial0/0
          Route metric is 10240256, traffic share count is 1
          Total delay is 10 microseconds, minimum bandwidth is 250 Kbit
          Reliability 1/255, minimum MTU 1 bytes
          Loading 1/255, Hops 1
          Route tag 3110
      * 183.1.123.1, from 183.1.123.1, 01:25:08 ago, via Serial0/0
          Route metric is 2560256, traffic share count is 4
          Total delay is 10 microseconds, minimum bandwidth is 1000 Kbit
          Reliability 1/255, minimum MTU 1 bytes
          Loading 1/255, Hops 4
          Route tag 5110

    On Tue, Nov 18, 2008 at 9:22 PM, shivalao <bounce-shivalao@ieoc.com> wrote:

    Please find below the result of routing and topology table. Thanks.

     

    Rack2R4(config-router)#do sh ip route 192.10.2.0
    Routing entry for 192.10.2.0/24
      Known via "eigrp 1024", distance 170, metric 2560002816, type external
      Redistributing via eigrp 1024
      Last update from 174.2.45.5 on FastEthernet0/1, 00:00:07 ago
      Routing Descriptor Blocks:
      * 174.2.45.5, from 174.2.45.5, 00:00:07 ago, via FastEthernet0/1
          Route metric is 2560002816, traffic share count is 1
          Total delay is 110 microseconds, minimum bandwidth is 1 Kbit
          Reliability 1/255, minimum MTU 1 bytes
          Loading 1/255, Hops 1

     

    Rack2R4(config-router)#do sh ip eig top 192.10.2.0
    IP-EIGRP (AS 1024): Topology entry for 192.10.2.0/24
      State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2560002816
      Routing Descriptor Blocks:
      174.2.45.5 (FastEthernet0/1), from 174.2.45.5, Send flag is 0x0
          Composite metric is (2560002816/2560000256), Route is External
          Vector metric:
            Minimum bandwidth is 1 Kbit
            Total delay is 110 microseconds
            Reliability is 1/255
            Load is 1/255
            Minimum MTU is 1
            Hop count is 1
          External data:
            Originating router is 150.2.5.5 
            AS number of route is 0
            External protocol is RIP, external metric is 0
            Administrator tag is 0 (0x00000000)
      174.2.145.1 (Serial0/0), from 174.2.145.1, Send flag is 0x0
          Composite metric is (2560512512/2560000512), Route is External
          Vector metric:
            Minimum bandwidth is 1 Kbit
            Total delay is 20020 microseconds
            Reliability is 1/255
            Load is 1/255
            Minimum MTU is 1
            Hop count is 2
          External data:
            Originating router is 150.2.5.5 
            AS number of route is 0
            External protocol is RIP, external metric is 0
            Administrator tag is 0 (0x00000000)




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    • Post Points: 20
  • 11-19-2008 9:14 AM In reply to

    • shivalao
    • Top 500 Contributor
    • Joined on 10-02-2008
    • Posts 6
    • Points 105

    Re: lab 8 section 3.7 eigrp unequal load balancing

    Hi apd123,

    Thank you for this knowledge, you've added something in my stock. The coolest thing about section 3.7 is to learn how to calculate composite metric (from the source to the destination). Have you tried to that before? Thank you.

     

    • Post Points: 5
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