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hoi ve bgp routing

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  • #1

    hoi ve bgp routing

    Em lab về AS-Path trong bgp. sau kho lab xong route học đầy đủ trên các router. sao em ping từ R1 đến R4 không thông các bác . chả hiểu ???

    R1#show ip rou
    R1#show ip route
    Codes: 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, su - IS-IS summary, 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

    137.1.0.0/16 is variably subnetted, 3 subnets, 2 masks
    C 137.1.12.0/30 is directly connected, Serial0/0
    C 137.1.1.0/24 is directly connected, Loopback0
    B 137.1.4.0/24 [20/0] via 137.1.12.2, 00:37:53
    --------------------
    R2#sho ip route
    Codes: 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, su - IS-IS summary, 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

    137.1.0.0/16 is variably subnetted, 4 subnets, 2 masks
    C 137.1.12.0/30 is directly connected, Serial0/0
    B 137.1.1.0/24 [20/0] via 137.1.12.1, 00:38:44
    B 137.1.4.0/24 [20/0] via 137.1.23.3, 00:42:16
    C 137.1.23.0/24 is directly connected, Serial0/1

    --------------------------------------

    R3#show ip route
    Codes: 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, su - IS-IS summary, 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

    137.1.0.0/24 is subnetted, 4 subnets
    B 137.1.1.0 [20/0] via 137.1.23.2, 00:39:04
    B 137.1.4.0 [20/0] via 137.1.34.4, 00:42:42
    C 137.1.23.0 is directly connected, Serial0/0
    C 137.1.34.0 is directly connected, Serial0/1


    ------------------------



    R4#show ip rou
    R4#show ip route
    Codes: 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, su - IS-IS summary, 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

    137.1.0.0/24 is subnetted, 3 subnets
    B 137.1.1.0 [20/0] via 137.1.34.3, 00:00:08
    C 137.1.4.0 is directly connected, Loopback0
    C 137.1.34.0 is directly connected, Serial0/0
    R4#

    --------------------

    R1#ping 137.1.4.4

    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 137.1.4.4, timeout is 2 seconds:
    ...

    ------------

    bác nào giải thích hộ em với ah
    Attached Files
    Last edited by gamopro; 04-10-2012, 10:19 AM.
    Tags: None
  • #2
    Originally posted by gamopro View Post
    Em lab về AS-Path trong bgp. sau kho lab xong route học đầy đủ trên các router. sao em ping từ R1 đến R4 không thông các bác . chả hiểu ???

    R1#show ip rou
    R1#show ip route
    Codes: 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, su - IS-IS summary, 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

    137.1.0.0/16 is variably subnetted, 3 subnets, 2 masks
    C 137.1.12.0/30 is directly connected, Serial0/0
    C 137.1.1.0/24 is directly connected, Loopback0
    B 137.1.4.0/24 [20/0] via 137.1.12.2, 00:37:53
    --------------------
    R2#sho ip route
    Codes: 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, su - IS-IS summary, 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

    137.1.0.0/16 is variably subnetted, 4 subnets, 2 masks
    C 137.1.12.0/30 is directly connected, Serial0/0
    B 137.1.1.0/24 [20/0] via 137.1.12.1, 00:38:44
    B 137.1.4.0/24 [20/0] via 137.1.23.3, 00:42:16
    C 137.1.23.0/24 is directly connected, Serial0/1

    --------------------------------------

    R3#show ip route
    Codes: 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, su - IS-IS summary, 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

    137.1.0.0/24 is subnetted, 4 subnets
    B 137.1.1.0 [20/0] via 137.1.23.2, 00:39:04
    B 137.1.4.0 [20/0] via 137.1.34.4, 00:42:42
    C 137.1.23.0 is directly connected, Serial0/0
    C 137.1.34.0 is directly connected, Serial0/1


    ------------------------



    R4#show ip rou
    R4#show ip route
    Codes: 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, su - IS-IS summary, 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

    137.1.0.0/24 is subnetted, 3 subnets
    B 137.1.1.0 [20/0] via 137.1.34.3, 00:00:08
    C 137.1.4.0 is directly connected, Loopback0
    C 137.1.34.0 is directly connected, Serial0/0
    R4#

    --------------------

    R1#ping 137.1.4.4

    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 137.1.4.4, timeout is 2 seconds:
    ...

    ------------

    bác nào giải thích hộ em với ah


    bạn gõ:R1#ping 137.1.4.4 source loo1(của r1) xem thử bạn!...

    Comment

    • #3
      ok rồi bác. Tiện cho em hỏi sao ping source thì được mà để ping không lại không được?

      Comment

      • #4
        có nghĩa là bạn lấy đia chỉ loo1 ping 137.1.4.4. tại vì trên router có nhất nhiều ip connected.

        Comment

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