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  • kowika87

    tag

    válasz crok #10144 üzenetére

    A topológia ide kapcsolódó része:
    Kép

    2 külön AS-be megy a két vonal.
    Customer routeren NAT van:
    ip nat inside source route-map NAT-E0/0 interface Ethernet0/0 overload
    ip nat inside source route-map NAT-S0/0 interface Serial0/0 overload

    SLA figyeli R4 E0/0 interfészét a track pedig reachabilityre van állítva:

    ip sla 1
    icmp-echo 156.12.59.38 source-ip 156.12.59.37
    threshold 500
    timeout 1000
    frequency 3

    track 1 ip sla 1 reachability

    Két static route van fent a primary-t figyelem:

    CUSTOMER_R7#sh run | s ip route
    ip route 0.0.0.0 0.0.0.0 156.12.59.38 track 1
    ip route 0.0.0.0 0.0.0.0 156.12.59.34 20

    Ha lecsapom a linket R4-en ez történik:

    CUSTOMER_R7#debug ip routing
    CUSTOMER_R7#debug track all

    CUSTOMER_R7#ping 50.50.50.50 so l10 rep 10000
    Type escape sequence to abort.
    Sending 10000, 100-byte ICMP Echos to 50.50.50.50, timeout is 2 seconds:
    Packet sent with a source address of 192.168.50.1
    (sok ping)
    !!...
    *Feb 6 18:59:35.731: track-sta (1) Change #5 ip sla 1, reachability Up->Down
    *Feb 6 18:59:35.731: %TRACK-6-STATE: 1 ip sla 1 reachability Up -> Down
    *Feb 6 18:59:35.731: track-sta (1) ip sla 1 reachability Up -> Down
    *Feb 6 18:59:35.731: track-que (1) Queuing CHANGED client event for Static IP Routing
    *Feb 6 18:59:35.731: track-que (1) Unqueuing CHANGED client event for Static IP Routing
    *Feb 6 18:59:35.731: RT: del 0.0.0.0 via 156.12.59.38, static metric [1/0]
    *Feb 6 18:59:35.731: RT: delete network route to 0.0.0.0/0
    *Feb 6 18:59:35.731: RT: default path has been cleared
    *Feb 6 18:59:35.731: RT: updating static 0.0.0.0/0 (0x0) :
    via 156.12.59.34 0 1048578

    *Feb 6 18:59:35.731: RT: add 0.0.0.0/0 via 156.12.59.34, static metric [20/0]
    *Feb 6 18:59:35.731: RT: default path is now 0.0.0.0 via 156.12.59.34.
    *Feb 6 18:59:35.732: RT: updating static 0.0.0.0/0 (0x0) :
    via 156.12.59.34 0 1048578
    ......................
    Success rate is 99 percent (6092/6118), round-trip min/avg/max = 1/1/5 ms

    Átkerül a másik útvonal a route táblába de a ping nem megy tovább.

    Újraping esetén már megy:

    CUSTOMER_R7#ping 50.50.50.50 so l10
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 50.50.50.50, timeout is 2 seconds:
    Packet sent with a source address of 192.168.50.1
    !!!!!
    Success rate is 100 percent (5/5), round-trip min/avg/max = 19/19/20 ms
    CUSTOMER_R7#

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