在上一篇文章的故障处理中【网络故障排除的举例【网络排障连载03】】已保证PC1和SW3之间无故障,Server6和SW5之间无故障。
如下图所示,将PC1无法使用FTP服务的故障原因列举如下:
<SW3>display ip routing-table protocol static
Route Flags: R - relay, D - download to fib
--------------------------------------------------
Destination/Mask Proto Pre Cost Flags NextHop Interface
0.0.0.0/0 Static 60 0 RD 10.0.13.1 Vlanif13
<R1>display ip routing-table 192.168.56.0
<R1>display ip routing-table 192.168.56.0
<R1>display bgp peer
BGP local router ID : 10.0.1.1
Local AS number : 100
Total number of peers : 1 Peers in established state : 0
Peer AS MsgRcvd MsgSent OutQ Up/Down State PrefRcv
10.0.2.2 100 0 0 0 0:00:05 Idle 0
<R1>display ip routing-table 10.0.2.2
<R1>display ospf peer
OSPF Process 1 with Router ID 10.0.1.1
[R1]display ospf error
General packet errors:
0 : IP: received my own packet 0 : Bad packet
0 : Bad version 0 : Bad checksum
0 : Bad area id 0 : Drop on unnumbered interface
0 : Bad virtual link 0 : Bad authentication type
0 : Bad authentication key 0 : Packet too small
0 : Packet size > ip length 0 : Transmit error
0 : Interface down 0 : Unknown neighbor
0 : Bad net segment 0 : Extern option mismatch
133 : Router id confusion
<R1>terminal debugging
Info: Current terminal debugging is on.
<R1>debugging ospf packet interface GigabitEthernet 0/0/0
<R1>display ospf interface GigabitEthernet 0/0/0 verbose
OSPF Process 1 with Router ID 10.0.1.1
Interface: 10.0.12.1 (GigabitEthernet0/0/0)
Cost: 1 State: DR Type: Broadcast MTU: 1500
Priority: 1
Designated Router: 10.0.12.1
Backup Designated Router: 0.0.0.0
Timers: Hello 10 , Dead 40 , Poll 120 , Retransmit 5 , Transmit Delay 1
IO Statistics
Type Input Output
Hello 36 36
: Source Address: 10.0.12.2
: Destination Address: 224.0.0.5
: Ver# 2, Type: 1 (Hello)
: Length: 44, Router: 10.0.1.1
: Area: 0.0.0.0, Chksum: db9c
: AuType: 00
: Key(ascii): * * * * * * * *
: Net Mask: 255.255.255.0
: Hello Int: 10, Option: _E_
: Rtr Priority: 1, Dead Int: 40
[R2]display telnet server status
TELNET IPV4 server :Enable
TELNET IPV6 server :Enable
TELNET server port :23
[R2-ui-vty0-4]display this
user-interface vty 0 4
authentication-mode aaa
protocol inbound ssh
<R2>display ospf peer
OSPF Process 1 with Router ID 10.0.12.2
Neighbors
Area 0.0.0.0 interface 10.0.12.2(GigabitEthernet0/0/0)'s neighbors
Router ID: 10.0.1.1 Address: 10.0.12.1
State: Full Mode:Nbr is Slave Priority: 1
DR: 10.0.12.2 BDR: 10.0.12.1 MTU: 0
Dead timer due in 35 sec
Retrans timer interval: 5
Neighbor is up for 00:09:17
Authentication Sequence: [ 0 ]
<R1>display ip routing-table 10.0.2.2
Route Flags: R - relay, D - download to fib
------------------------------------------------------------
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.2.2/32 OSPF 10 1 D 10.0.12.2 GE0/0/0
<R1>display bgp peer
BGP local router ID : 10.0.1.1
Local AS number : 100
Total number of peers : 1 Peers in established state : 1
Peer AS MsgRcvd MsgSent Up/Down State
10.0.2.2 100 25 26 0:19:22 Established
<R1>display bgp routing-table
BGP Local router ID is 10.0.1.1
Total Number of Routes: 2
Network NextHop MED LocPrf Path/Ogn
*>192.168.12.0/24 0.0.0.0 0 0 ?
<R3>display bgp routing-table
BGP Local router ID is 10.0.3.3
Total Number of Routes: 1
Network NextHop MED LocPrf Path/Ogn
*> 192.168.56.0 0.0.0.0 0 0 ?
<R3>display bgp peer
BGP local router ID : 10.0.3.3
Local AS number : 100
Total number of peers : 1 Peers in established state : 0
Peer AS MsgRcvd MsgSent OutQ Up/Down State PrefRcv
10.0.2.2 100 0 0 0 0:00:05 Idle 0
<R3>display ip routing-table 10.0.2.2
<R3>display isis peer
Peer information for ISIS(1)
SystemId Interface CircuitId State Type PRI
0100.0000.2002 GE0/0/1 0100.0000.2002.01 Up L2 64
<R2>display isis interface
Interface information for ISIS(1)
Interface Id IPV4.State MTU Type DIS
GE0/0/1 1 Up 1497 L1/L2 No/Yes
Loop0 1 Up 1500 L1/L2 --
isis 1
is-level level-2
cost-style wide
network-entity 49.0001.0100.0000.2002.00
import-route ospf 1
isis 1
is-level level-2
network-entity 49.0001.0100.0000.3003.00
<R3>display ip routing-table 10.0.2.2
Route Flags: R - relay, D - download to fib
--------------------------------------------------------------
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.2.2/32 ISIS-L2 15 10 D 10.0.23.2 GE0/0/1
<R3>display bgp peer
BGP local router ID : 10.0.23.3
Peer AS MsgRcvd MsgSent Up/Down State
10.0.2.2 100 8 7 0:04:42 Established
<R3>display bgp routing-table
Total Number of Routes: 2
Network NextHop MED LocPrf Path/Ogn
*>I 192.168.12.0 10.0.1.1 0 100 ?
*> 192.168.56.0 0.0.0.0 0 0 ?
<R3>display bgp peer
<R1>display bgp routing-table BGP Local router ID is 10.0.1.1
Network NextHop MED LocPrf Path/Ogn
*> 192.168.12.0 0.0.0.0 0 0 ?
I 192.168.56.0 10.0.3.3 0 100 ?
<R1>display ip routing-table 10.0.3.3
<R1>display ospf lsdb
OSPF Process 1 with Router ID 10.0.1.1
Area: 0.0.0.0
Type LinkStateID AdvRouter Age Len Sequence Metric
Router 10.0.2.2 10.0.2.2 5 48 80000003 1
Router 10.0.1.1 10.0.1.1 3 48 8000000D 1
Network 10.0.12.1 10.0.1.1 3 32 80000002 0
<R2>display current-configuration configuration ospf
#
ospf 1 router-id 10.0.2.2
area 0.0.0.0
network 10.0.2.2 0.0.0.0
network 10.0.12.2 0.0.0.0 ·
<R1>display ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.3.3/32 O_ASE 150 1 D 10.0.12.2 GE0/0/0
192.168.56.0/24 IBGP 255 0 RD 10.0.3.3 GE0/0/0
traceroute to 192.168.56.6, 8
1 192.168.12.3 63 ms 46 ms 47 ms
2 10.0.13.1 78 ms 63 ms 62 ms
3 10.0.12.2 94 ms 63 ms 78 ms
4 10.0.23.3 94 ms 62 ms 63 ms
5 * * *
[R3] acl 3000
[R3-acl-adv-3000]rule 5 permit ip source 192.168.12.1 0 destination 192.168.56.6 0
[R3-acl-adv-3000]quit
[R3]traffic classifier trafficSta
[R3-classifier-trafficSta]if-match acl 3000
[R3-classifier-trafficSta]quit
[R3]traffic behavior trafficSta
[R3-behavior-trafficSta]statistic enable
[R3-behavior-trafficSta]quit
[R3]traffic policy trafficSta
[R3-trafficpolicy-trafficSta]classifier trafficSta behavior trafficSta
[R3-trafficpolicy-trafficSta]quit
[R3]interface GigabitEthernet0/0/2.35
[R3-GigabitEthernet0/0/2.35]traffic-policy trafficSta outbound
<R3> display traffic policy statistics interface GigabitEthernet0/0/2.35 outbound
Interface:GigabitEthernet0/0/2.35
Traffic policy inbound: trafficSta
Rule number: 1
Current status: OK!
Item Sum(Packets/Bytes)
-----------------------------------------
Matched 50/400
Passed 50/400
Dropped 0/0
[SW5]display ip routing-table
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.0.35.0/24 Direct 0 0 D 10.0.35.5 Vlanif35
192.168.56.0/24 Direct 0 0 D 192.168.56.5 Vlanif56