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    Routing Fornetworks

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    Adlane Boussa
    The configuration shows that the 'gateway' listed in the 'show ip protocol' output refers to the interfaces receiving routing updates, not the interfaces identified in network statements. This is because the gateway can be interfaces other than loopbacks or routers more than one hop away. Disabling auto-summary in EIGRP prevents automatic route summarization and advertising of subnetted routes, allowing more specific routes to be advertised.

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    Routing Fornetworks

    Uploaded by

    Adlane Boussa
    3 views3 pages
    The configuration shows that the 'gateway' listed in the 'show ip protocol' output refers to the interfaces receiving routing updates, not the interfaces identified in network statements. This is because the gateway can be interfaces other than loopbacks or routers more than one hop away. Disabling auto-summary in EIGRP prevents automatic route summarization and advertising of subnetted routes, allowing more specific routes to be advertised.

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    RoutingFornetworks

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    The configuration shows that the 'gateway' listed in the 'show ip protocol' output refers to the interfaces receiving routing updates, not the interfaces identified in network statements. This is because the gateway can be interfaces other than loopbacks or routers more than one hop away. Disabling auto-summary in EIGRP prevents automatic route summarization and advertising of subnetted routes, allowing more specific routes to be advertised.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    3 views3 pages

    Routing Fornetworks

    Uploaded by

    Adlane Boussa
    The configuration shows that the 'gateway' listed in the 'show ip protocol' output refers to the interfaces receiving routing updates, not the interfaces identified in network statements. This is because the gateway can be interfaces other than loopbacks or routers more than one hop away. Disabling auto-summary in EIGRP prevents automatic route summarization and advertising of subnetted routes, allowing more specific routes to be advertised.

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    of 3

    Hi, all I did a lab today to prove that 'gateway' in 'Routing Information

    Source' from 'show ip protocol' refer to the interface that is identified by the
    network statement. However, the following configuration shows something
    different, I just want to confirm if this is right.

    The configuration I have tells me that 'gateway' are the interfaces that
    received the routing update. This interface can't be a loopback nor a router
    more than 1 hop away. R3#show ip proRouting Protocol is "rip" Sending
    updates every 30 seconds, next due in 11 seconds Invalid after 180
    seconds, hold down 180, flushed after 240 Outgoing update filter list for
    all interfaces is not set Incoming update filter list for all interfaces is not
    set Redistributing: rip Default version control: send version 2, receive
    version 2 Interface Send Recv Triggered RIP Key-chain
    FastEthernet0/0 2 2 Serial0/0 2
    2 Loopback100 2
    2 Loopback101 2
    2 Automatic network summarization is not in effect
    Maximum path: 4 Routing for Networks: 10.0.0.0 192.168.1.0
    192.168.2.0 Routing Information Sources: Gateway Distance
    Last Update 192.168.2.2 120 00:00:07 192.168.1.2
    120 00:00:08 Distance: (default is 120) R2#show ip proRouting
    Protocol is "rip" Sending updates every 30 seconds, next due in 24
    seconds Invalid after 180 seconds, hold down 180, flushed after 240
    Outgoing update filter list for all interfaces is not set Incoming update filter
    list for all interfaces is not set Redistributing: rip Default version control:
    send version 2, receive version 2 Interface Send Recv
    Triggered RIP Key-chain FastEthernet0/0 2
    2 Serial0/0 2 2
    Serial1/0 2 2 Automatic network
    summarization is not in effect Maximum path: 4 Routing for Networks:
    192.168.0.0 192.168.1.0 192.168.2.0 Routing Information Sources:
    Gateway Distance Last Update 192.168.0.1 120
    00:00:27 192.168.2.3 120 00:00:15 192.168.1.3 120
    00:00:15 Distance: (default is 120) R1#show ip proRouting Protocol is
    "rip" Sending updates every 30 seconds, next due in 27 seconds Invalid
    after 180 seconds, hold down 180, flushed after 240 Outgoing update
    filter list for all interfaces is not set Incoming update filter list for all
    interfaces is not set Redistributing: rip Default version control: send
    version 2, receive version 2 Interface Send Recv Triggered
    RIP Key-chain Serial0/0 2 2
    Loopback100 2 2 Loopback101
    2 2 Automatic network summarization is not in
    effect Maximum path: 4 Routing for Networks: 10.0.0.0 192.168.0.0
    Routing Information Sources: Gateway Distance Last Update
    192.168.0.2 120 00:00:19 Distance: (default is 120) I
    have another lab question here, hope it's not too much of a trouble: What
    exactly is the purpose of 'no auto-summary' in EIGRP? I don't see any
    difference between the routing table. But I do see a difference when I'm
    using 'ip summary-address eigrp 172 10.10.0.0 255.255.252.0' R2#show
    ip routeCodes: C - connected, S - static, R - RIP, M - mobile, B - BGP
    D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1
    - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 -
    OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, L1 - IS-IS
    level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U -
    per-user static route, o - ODR P - periodic downloaded static route
    Gateway of last resort is not set 172.16.0.0/26 is subnetted, 1 subnets
    C 172.16.1.0 is directly connected, Serial0/0 10.0.0.0/22 is
    subnetted, 1 subnetsD 10.10.0.0 [90/2297856] via 172.16.1.2,
    00:00:08, Serial0/0R2#R2#conf tEnter configuration commands, one per
    line. End with CNTL/Z.R2(config)#R2(config)#router eigrp 172R2(config-
    router)#R2(config-router)#no auto-sR2(config-router)#R2(config-
    router)#^ZR2#Aug 29 20:32:38.654: %SYS-5-CONFIG_I: Configured from
    console by consoleR2#R2#show ip routeCodes: C - connected, S - static,
    R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O -
    OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 -
    OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF
    external type 2 i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS
    inter area * - candidate default, U - per-user static route, o - ODR P
    - periodic downloaded static route Gateway of last resort is not set
    172.16.0.0/26 is subnetted, 1 subnetsC 172.16.1.0 is directly
    connected, Serial0/0 10.0.0.0/22 is subnetted, 1 subnetsD 10.10.0.0
    [90/2297856] via 172.16.1.2, 00:02:32, Serial0/0 Regards,Angela
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