Re: [問答] traceroute問題

看板Network作者wst2080時間15年前 (2010/11/23 22:33)推噓2(2推 0噓 2→)

留言4則, 4人參與討論串8/9 (看更多)

※ 引述《jeffccc (奇蹟の蘇生)》之銘言： : ┌──── R2 ───── R4 ───┐ : Switch ─── R1 目的端 : └──── R3 ───── R5 ───┘ 按照你的需求從EIGRP改成OSPF了並且用真實的機器下去Run (怕模擬器跑的不完善) Switch: 1.1.1.1 R1 and R2 之間屬於 12.1.1.0/24 網段 R1 and R3 之間屬於 21.1.1.0/24 網段 R2 and R4 之間屬於 23.1.1.0/24 網段 R3 and R5 之間屬於 32.1.1.0/24 網段 R4 and 目的端之間屬於 34.1.1.0/24 網段 R5 and 目的端之間屬於 43.1.1.0/24 網段目的端: 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 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^兩條路徑均為同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與R5 在這次Traceroute當中並無輸出結果~~~ 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 經過上面的實驗看下來~ 從第二個階段測試~ 發現當部分Traceroute到達100.100.100.100的時候,部份封包則會走上面的路徑!!! 這是因為受到路由器上頭的OSPF動態路由協議上頭的路由抉擇(負載均衡) 測試的結果就是跟之前說的一些鄉民說的一樣~~~ 是一個個測試... Switch先跑跑完再讓R1去跑跑完後 R1收到要求再將封包透過動態路由協議的方式抉擇路徑第一次是跑 Switch → R1 → R2 → R4 → 目的端第二次則跑 Switch → R1 → R3 → R5 → 目的端 ** 而稍微發現目的端的其中一次Traceroute封包則是會透過目的端 → R4 → R2 → R1 然後給Switch收到原因就是因為路由器上頭的Routing Protocol傳輸導致~~~ 並不是原po說的什麼10個欄位之類的部份... PS: 弄得很累... 希望你看的懂!!! 不懂的話... 就去買本TCP/IP聖經自己K一K吧...... -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.116.248.253

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