作者wst2080 ()
看板Network
标题Re: [问答] traceroute问题
时间Tue Nov 23 22:33:29 2010
※ 引述《jeffccc (奇蹟の苏生)》之铭言：
: ┌──── R2 ───── R4 ───┐
: Switch ─── R1 目的端
: └──── R3 ───── R5 ───┘
按照你的需求 从EIGRP改成OSPF了 并且用真实的机器下去Run (怕模拟器跑的不完善)
Switch: 1.1.1.1
R1 and R2 之间属於 12.1.1.0/24 网段
R1 and R3 之间属於 21.1.1.0/24 网段
R2 and R4 之间属於 23.1.1.0/24 网段
R3 and R5 之间属於 32.1.1.0/24 网段
R4 and 目的端之间属於 34.1.1.0/24 网段
R5 and 目的端之间属於 43.1.1.0/24 网段
目的端: 100.100.100.100
Router-2611-2#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
34.0.0.0/24 is subnetted, 1 subnets
O 34.1.1.0 [110/1572] via 12.1.1.2, 00:04:54, Serial0/0
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Ethernet0/1
32.0.0.0/24 is subnetted, 1 subnets
O 32.1.1.0 [110/1562] via 21.1.1.2, 00:04:54, Serial0/1
100.0.0.0/32 is subnetted, 1 subnets
O 100.100.100.100 [110/1573] via 21.1.1.2, 00:04:54, Serial0/1
[110/1573] via 12.1.1.2, 00:04:54, Serial0/0
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^两条路径均为同cost
21.0.0.0/24 is subnetted, 1 subnets
C 21.1.1.0 is directly connected, Serial0/1
23.0.0.0/24 is subnetted, 1 subnets
O 23.1.1.0 [110/1562] via 12.1.1.2, 00:04:55, Serial0/0
43.0.0.0/24 is subnetted, 1 subnets
O 43.1.1.0 [110/1572] via 21.1.1.2, 00:04:57, Serial0/1
12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, Serial0/0
第一次Traceroute 100.100.100.100
Switch:
Switch#tracer 100.100.100.100
Type escape sequence to abort.
Tracing the route to
01:45:15: UDP: sent src=1.1.1.10(55288), dst=255.255.255.255(53), length=74
01:45:15: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 74, sending broad/multicast
01:45:18: UDP: sent src=1.1.1.10(55288), dst=255.255.255.255(53), length=74
01:45:18: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 74, sending broad/multicast
01:45:21: UDP: sent src=1.1.1.10(55288), dst=255.255.255.255(53), length=74
01:45:21: IP: s=1.1.1.10 (local), fa d=255.255.255.255 (VLAN1), len 74, sending broad/multicast
100.100.100.100
1
01:45:24: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:25: IP: s=1.1.1.1 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:25: UDP: sent src=1.1.1.10(54857), dst=255.255.255.255(53), length=66
01:45:25: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 66, sending broad/multicast
01:45:28: UDP: sent src=1.1.1.10(54857), dst=255.255.255.255(53), length=66
01:45:28: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 66, sending broad/multicast
01:45:31: UDP: sent src=1.1.1.10(54857), dst=255.255.255.255(53), length=66
01:45:31: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 66, sending broad/multicast
1.1.1.1 5 msec 5 msec 6 msec
2
01:45:34: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:34: IP: s=1.1.1.1 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:34: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:34: IP: s=1.1.1.1 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:34: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:34: IP: s=12.1.1.2 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:34: UDP: sent src=1.1.1.10(52151), dst=255.255.255.255(53), length=67
01:45:34: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:45:37: UDP: sent src=1.1.1.10(52151), dst=255.255.255.255(53), length=67
01:45:37: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:45:40: UDP: sent src=1.1.1.10(52151), dst=255.255.255.255(53), length=67
01:45:40: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
12.1.1.2 19 msec 19 msec 18 msec
3
01:45:43: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:43: IP: s=12.1.1.2 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:43: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:43: IP: s=12.1.1.2 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:43: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:43: IP: s=23.1.1.3 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:43: UDP: sent src=1.1.1.10(49787), dst=255.255.255.255(53), length=67
01:45:43: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:45:46: UDP: sent src=1.1.1.10(49787), dst=255.255.255.255(53), length=67
01:45:46: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:45:49: UDP: sent src=1.1.1.10(49787), dst=255.255.255.255(53), length=67
01:45:49: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
23.1.1.3 31 msec 32 msec 29 msec
4
01:45:52: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:52: IP: s=23.1.1.3 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:52: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:52: IP: s=23.1.1.3 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:52: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:45:52: IP: s=34.1.1.4 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:45:52: ICMP: dst (1.1.1.10) port unreachable rcv from 34.1.1.4
01:45:52: UDP: sent src=1.1.1.10(52476), dst=255.255.255.255(53), length=67
01:45:52: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:45:55: UDP: sent src=1.1.1.10(52476), dst=255.255.255.255(53), length=67
01:45:55: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:45:58: UDP: sent src=1.1.1.10(52476), dst=255.255.255.255(53), length=67
01:45:58: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
34.1.1.4 34 msec 34 msec
01:46:01: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:46:01: IP: s=34.1.1.4 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:46:01: ICMP: dst (1.1.1.10) port unreachable rcv from 34.1.1.4
01:46:01: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending *
R2:
*Mar 1 01:43:50.733: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:43:50.737: IP: tableid=0, s=12.1.1.2 (local), d=1.1.1.10 (Serial0/1), routed via FIB
*Mar 1 01:43:50.737: IP: s=12.1.1.2 (local), d=1.1.1.10 (Serial0/1), len 56, sending
*Mar 1 01:43:59.768: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:43:59.768: IP: tableid=0, s=12.1.1.2 (local), d=1.1.1.10 (Serial0/1), routed via FIB
*Mar 1 01:43:59.768: IP: s=12.1.1.2 (local), d=1.1.1.10 (Serial0/1), len 56, sending
*Mar 1 01:43:59.784: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:43:59.788: IP: tableid=0, s=12.1.1.2 (local), d=1.1.1.10 (Serial0/1), routed via FIB
*Mar 1 01:43:59.788: IP: s=12.1.1.2 (local), d=1.1.1.10 (Serial0/1), len 56, sending
R4:
*Mar 1 01:41:48.826: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:41:48.826: IP: tableid=0, s=23.1.1.3 (local), d=1.1.1.10 (Serial0/1), routed via FIB
*Mar 1 01:41:48.826: IP: s=23.1.1.3 (local), d=1.1.1.10 (Serial0/1), len 56, sending
*Mar 1 01:41:57.872: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:41:57.872: IP: tableid=0, s=23.1.1.3 (local), d=1.1.1.10 (Serial0/1), routed via FIB
*Mar 1 01:41:57.872: IP: s=23.1.1.3 (local), d=1.1.1.10 (Serial0/1), len 56, sending
*Mar 1 01:41:57.904: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:41:57.904: IP: tableid=0, s=23.1.1.3 (local), d=1.1.1.10 (Serial0/1), routed via FIB
*Mar 1 01:41:57.904: IP: s=23.1.1.3 (local), d=1.1.1.10 (Serial0/1), len 56, sending
R3与R5 在这次Traceroute当中并无输出结果~~~
目的端:
*Mar 1 01:43:26.750: IP: s=1.1.1.10 (FastEthernet0/0), d=100.100.100.100, len 28, rcvd 0
*Mar 1 01:43:26.754: UDP: rcvd src=1.1.1.10(40112), dst=100.100.100.100(33443), length=8
*Mar 1 01:43:26.754: ICMP: dst (100.100.100.100) port unreachable sent to 1.1.1.10
*Mar 1 01:43:26.754: IP: tableid=0, s=34.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), routed via FIB
*Mar 1 01:43:26.754: IP: s=34.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), len 56, sending
*Mar 1 01:43:35.797: IP: s=1.1.1.10 (FastEthernet0/0), d=100.100.100.100, len 28, rcvd 0
*Mar 1 01:43:35.801: UDP: rcvd src=1.1.1.10(32842), dst=100.100.100.100(33444), length=8
*Mar 1 01:43:35.801: ICMP: dst (100.100.100.100) port unreachable sent to 1.1.1.10
*Mar 1 01:43:35.801: IP: tableid=0, s=34.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), routed via FIB
*Mar 1 01:43:35.801: IP: s=34.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), len 56, sending
*Mar 1 01:43:35.833: IP: s=1.1.1.10 (FastEthernet0/0), d=100.100.100.100, len 28, rcvd 0
*Mar 1 01:43:35.833: UDP: rcvd src=1.1.1.10(42330), dst=100.100.100.100(33445), length=8
第二次 Traceroute 100.100.100.100
Switch:
Switch#tracer 100.100.100.100
Type escape sequence to abort.
Tracing the route to
01:53:19: UDP: sent src=1.1.1.10(59134), dst=255.255.255.255(53), length=74
01:53:19: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 74, sending broad/multicast
01:53:22: UDP: sent src=1.1.1.10(59134), dst=255.255.255.255(53), length=74
01:53:22: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 74, sending broad/multicast
01:53:25: UDP: sent src=1.1.1.10(59134), dst=255.255.255.255(53), length=74
01:53:25: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 74, sending broad/multicast
100.100.100.100
1
01:53:28: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:28: IP: s=1.1.1.1 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:28: UDP: sent src=1.1.1.10(56229), dst=255.255.255.255(53), length=66
01:53:28: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 66, sending broad/multicast
01:53:31: UDP: sent src=1.1.1.10(56229), dst=255.255.255.255(53), length=66
01:53:31: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 66, sending broad/multicast
01:53:34: UDP: sent src=1.1.1.10(56229), dst=255.255.255.255(53), length=66
01:53:34: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 66, sending broad/multicast
1.1.1.1 5 msec 6 msec 5 msec
2
01:53:37: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:37: IP: s=1.1.1.1 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:37: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:37: IP: s=1.1.1.1 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:37: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:37: IP: s=21.1.1.2 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:37: UDP: sent src=1.1.1.10(57222), dst=255.255.255.255(53), length=67
01:53:37: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:53:40: UDP: sent src=1.1.1.10(57222), dst=255.255.255.255(53), length=67
01:53:40: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:53:43: UDP: sent src=1.1.1.10(57222), dst=255.255.255.255(53), length=67
01:53:43: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
21.1.1.2 26 msec 19 msec 21 msec
3
01:53:46: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:46: IP: s=21.1.1.2 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:46: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:46: IP: s=21.1.1.2 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:46: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:46: IP: s=32.1.1.3 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:46: UDP: sent src=1.1.1.10(54371), dst=255.255.255.255(53), length=67
01:53:46: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:53:49: UDP: sent src=1.1.1.10(54371), dst=255.255.255.255(53), length=67
01:53:49: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:53:52: UDP: sent src=1.1.1.10(54371), dst=255.255.255.255(53), length=67
01:53:52: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
32.1.1.3 31 msec 31 msec 31 msec
4
01:53:55: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:55: IP: s=32.1.1.3 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:55: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:55: IP: s=32.1.1.3 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:55: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:53:55: IP: s=43.1.1.4 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:53:55: ICMP: dst (1.1.1.10) port unreachable rcv from 43.1.1.4
01:53:55: UDP: sent src=1.1.1.10(54806), dst=255.255.255.255(53), length=67
01:53:55: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:53:58: UDP: sent src=1.1.1.10(54806), dst=255.255.255.255(53), length=67
01:53:58: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
01:54:01: UDP: sent src=1.1.1.10(54806), dst=255.255.255.255(53), length=67
01:54:01: IP: s=1.1.1.10 (local), d=255.255.255.255 (VLAN1), len 67, sending broad/multicast
43.1.1.4 48 msec 34 msec
01:54:04: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending
01:54:04: IP: s=43.1.1.4 (VLAN1), d=1.1.1.10, len 56, rcvd 1
01:54:04: ICMP: dst (1.1.1.10) port unreachable rcv from 43.1.1.4
01:54:04: IP: s=1.1.1.10 (local), d=100.100.100.100 (VLAN1), len 28, sending *
R3:
*Mar 1 01:51:42.719: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:51:42.723: IP: tableid=0, s=21.1.1.2 (local), d=1.1.1.10 (Serial0/0), routed via FIB
*Mar 1 01:51:42.723: IP: s=21.1.1.2 (local), d=1.1.1.10 (Serial0/0), len 56, sending
*Mar 1 01:51:51.758: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:51:51.758: IP: tableid=0, s=21.1.1.2 (local), d=1.1.1.10 (Serial0/0), routed via FIB
*Mar 1 01:51:51.762: IP: s=21.1.1.2 (local), d=1.1.1.10 (Serial0/0), len 56, sending
*Mar 1 01:51:51.778: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:51:51.778: IP: tableid=0, s=21.1.1.2 (local), d=1.1.1.10 (Serial0/0), routed via FIB
*Mar 1 01:51:51.778: IP: s=21.1.1.2 (local), d=1.1.1.10 (Serial0/0), len 56, sending
R5:
*Mar 1 01:51:24.661: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:51:24.661: IP: s=32.1.1.3 (local), d=1.1.1.10 (Serial0/0), len 56, sending
*Mar 1 01:51:33.704: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:51:33.704: IP: s=32.1.1.3 (local), d=1.1.1.10 (Serial0/0), len 56, sending
*Mar 1 01:51:33.736: ICMP: time exceeded (time to live) sent to 1.1.1.10 (dest was 100.100.100.100)
*Mar 1 01:51:33.736: IP: s=32.1.1.3 (local), d=1.1.1.10 (Serial0/0), len 56, sending
R2:
*Mar 1 01:52:12.428: IP: tableid=0, s=43.1.1.4 (Serial0/0), d=1.1.1.10 (Serial0/1), routed via RIB
*Mar 1 01:52:12.428: IP: s=43.1.1.4 (Serial0/0), d=1.1.1.10 (Serial0/1), g=12.1.1.1, len 56, forward
R4:
*Mar 1 01:50:01.441: IP: tableid=0, s=43.1.1.4 (FastEthernet0/1), d=1.1.1.10 (Serial0/1), routed via RIB
*Mar 1 01:50:01.441: IP: s=43.1.1.4 (FastEthernet0/1), d=1.1.1.10 (Serial0/1), g=23.1.1.2, len 56, forward
目的端:
*Mar 1 01:49:57.731: IP: s=1.1.1.10 (FastEthernet0/0), d=100.100.100.100, len 28, rcvd 0
*Mar 1 01:49:57.735: UDP: rcvd src=1.1.1.10(42762), dst=100.100.100.100(33443), length=8
*Mar 1 01:49:57.735: ICMP: dst (100.100.100.100) port unreachable sent to 1.1.1.10
*Mar 1 01:49:57.735: IP: tableid=0, s=34.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), routed via FIB
*Mar 1 01:49:57.735: IP: s=34.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), len 56, sending
*Mar 1 01:50:06.838: IP: s=1.1.1.10 (FastEthernet0/0), d=100.100.100.100, len 28, rcvd 0
*Mar 1 01:50:06.838: UDP: rcvd src=1.1.1.10(32834), dst=100.100.100.100(33444), length=8
*Mar 1 01:50:06.838: ICMP: dst (100.100.100.100) port unreachable sent to 1.1.1.10
*Mar 1 01:50:06.838: IP: tableid=0, s=34.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), routed via FIB
*Mar 1 01:50:06.842: IP: s=34.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), len 56, sending
*Mar 1 01:50:06.870: IP: s=1.1.1.10 (FastEthernet0/0), d=100.100.100.100, len 28, rcvd 0
*Mar 1 01:50:06.874: UDP: rcvd src=1.1.1.10(40936), dst=100.100.100.100(33445), length=8
*Mar 1 01:51:30.247: IP: s=1.1.1.10 (FastEthernet0/1), d=100.100.100.100, len 28, rcvd 0
*Mar 1 01:51:30.247: UDP: rcvd src=1.1.1.10(41387), dst=100.100.100.100(33443), length=8
*Mar 1 01:51:30.247: ICMP: dst (100.100.100.100) port unreachable sent to 1.1.1.10
*Mar 1 01:51:30.247: IP: tableid=0, s=43.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), routed via FIB
*Mar 1 01:51:30.247: IP: s=43.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), len 56, sending
*Mar 1 01:51:39.298: IP: s=1.1.1.10 (FastEthernet0/1), d=100.100.100.100, len 28, rcvd 0
*Mar 1 01:51:39.298: UDP: rcvd src=1.1.1.10(41006), dst=100.100.100.100(33444), length=8
*Mar 1 01:51:39.302: ICMP: dst (100.100.100.100) port unreachable sent to 1.1.1.10
*Mar 1 01:51:39.302: IP: tableid=0, s=43.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), routed via FIB
*Mar 1 01:51:39.302: IP: s=43.1.1.4 (local), d=1.1.1.10 (FastEthernet0/0), len 56, sending
*Mar 1 01:51:39.334: IP: s=1.1.1.10 (FastEthernet0/1), d=100.100.100.100, len 28, rcvd 0
*Mar 1 01:51:39.334: UDP: rcvd src=1.1.1.10(32926), dst=100.100.100.100(33445), length=8
经过上面的实验看下来~
从第二个阶段测试~ 发现当部分Traceroute到达100.100.100.100的时候,部份封包则会走上面的路径!!!
这是因为受到路由器上头的OSPF动态路由协议上头的路由抉择(负载均衡)
测试的结果就是跟之前说的一些乡民说的一样~~~
是一个个测试... Switch先跑 跑完再让R1去跑 跑完後 R1收到要求 再将封包透过动态路由协议的方式抉择路径
第一次是跑 Switch → R1 → R2 → R4 → 目的端
第二次则跑 Switch → R1 → R3 → R5 → 目的端 **
而稍微发现目的端的其中一次Traceroute封包则是会透过 目的端 → R4 → R2 → R1 然後给Switch收到
原因就是因为路由器上头的Routing Protocol传输导致~~~ 并不是原po说的什麽10个栏位之类的部份...
PS: 弄得很累... 希望你看的懂!!! 不懂的话... 就去买本TCP/IP圣经自己K一K吧......
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