switch老化时间过长导致主机不通解决一例
2014-03-31 17:58
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一台switch上能ping通,另一台不能ping通,得到的mac address也和另外一台不同。Core-3750-1#ping 172.16.86.47
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to
172.16.86.47, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5),
round-trip min/avg/max = 1/2/9 ms
Core-3750-1#sh ip arp | in 172.16.86.47
Internet
172.16.86.47 0 984b.e16b.5315 ARPA
Vlan86
Core-3750-1#sh mac address-table | in
984b.e16b.5315
86 984b.e16b.5315 DYNAMIC
Gi1/0/4
Core-3750-2#ping 172.16.86.47
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to
172.16.86.47, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Core-3750-2#sh ip arp | in 172.16.86.47
Internet
172.16.86.47 44 3c4a.92fa.93a4 ARPA
Vlan86
Core-3750-2#sh mac address-table | in
3c4a.92fa.93a4
86 3c4a.92fa.93a4 DYNAMIC
Po1
Core-3750-2#
Core-3750-2#clear arp-cache //在switch2上先清除mac address-tables以解决暂时不能访问的问题。Core-3750-2#sh ip arp | in 172.16.86.47Internet 172.16.86.47 16 984b.e16b.5315 ARPA Vlan86 //已更新回来
//查看及更新switch上的mac address-tables的老化时间
Core-3750-1#sh interfaces po1
Port-channel1 is up, line protocol is up
(connected)
Hardware
is EtherChannel, address is 30e4.dba3.fb17 (bia 30e4.dba3.fb17)
MTU
1500 bytes, BW 2000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is unknown
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/0/23 Gi1/0/24
ARP
type: ARPA, ARP Timeout 04:00:00 //默认机器老化时间为4小时
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1700
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5
minute input rate 11447000 bits/sec, 2752 packets/sec
5
minute output rate 13052000 bits/sec, 2762 packets/sec
63149721869 packets input, 44232956472023 bytes, 0 no buffer
Received 1581074482 broadcasts (520448140 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 520448140 multicast, 0 pause input
0 input packets with dribble condition detected
74776492349 packets output, 62375481517592 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Core-3750-1#conf t
Enter configuration commands, one per
line. End with CNTL/Z.
Core-3750-1(config)#int po1
Core-3750-1(config-if)#arp timeout 3600
Core-3750-1(config-if)#end
Core-3750-1#wr
Building configuration...
[OK]
Core-3750-1#sh interfaces po1
Port-channel1 is up, line protocol is up
(connected)
Hardware is EtherChannel, address is 30e4.dba3.fb17 (bia 30e4.dba3.fb17)
MTU
1500 bytes, BW 2000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is unknown
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/0/23 Gi1/0/24
ARP
type: ARPA, ARP Timeout 01:00:00 //更改老化时间为1小时
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1700
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5
minute input rate 13595000 bits/sec, 2969 packets/sec
5
minute output rate 13102000 bits/sec, 2891 packets/sec
63149839463 packets input, 44233057907548 bytes, 0 no buffer
Received 1581074997 broadcasts (520448426 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 520448426 multicast, 0 pause input
0 input packets with dribble condition detected
74776581352 packets output, 62375504932495 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Core-3750-1#
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Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to
172.16.86.47, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5),
round-trip min/avg/max = 1/2/9 ms
Core-3750-1#sh ip arp | in 172.16.86.47
Internet
172.16.86.47 0 984b.e16b.5315 ARPA
Vlan86
Core-3750-1#sh mac address-table | in
984b.e16b.5315
86 984b.e16b.5315 DYNAMIC
Gi1/0/4
Core-3750-2#ping 172.16.86.47
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to
172.16.86.47, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Core-3750-2#sh ip arp | in 172.16.86.47
Internet
172.16.86.47 44 3c4a.92fa.93a4 ARPA
Vlan86
Core-3750-2#sh mac address-table | in
3c4a.92fa.93a4
86 3c4a.92fa.93a4 DYNAMIC
Po1
Core-3750-2#
Core-3750-2#clear arp-cache //在switch2上先清除mac address-tables以解决暂时不能访问的问题。Core-3750-2#sh ip arp | in 172.16.86.47Internet 172.16.86.47 16 984b.e16b.5315 ARPA Vlan86 //已更新回来
//查看及更新switch上的mac address-tables的老化时间
Core-3750-1#sh interfaces po1
Port-channel1 is up, line protocol is up
(connected)
Hardware
is EtherChannel, address is 30e4.dba3.fb17 (bia 30e4.dba3.fb17)
MTU
1500 bytes, BW 2000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is unknown
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/0/23 Gi1/0/24
ARP
type: ARPA, ARP Timeout 04:00:00 //默认机器老化时间为4小时
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1700
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5
minute input rate 11447000 bits/sec, 2752 packets/sec
5
minute output rate 13052000 bits/sec, 2762 packets/sec
63149721869 packets input, 44232956472023 bytes, 0 no buffer
Received 1581074482 broadcasts (520448140 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 520448140 multicast, 0 pause input
0 input packets with dribble condition detected
74776492349 packets output, 62375481517592 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Core-3750-1#conf t
Enter configuration commands, one per
line. End with CNTL/Z.
Core-3750-1(config)#int po1
Core-3750-1(config-if)#arp timeout 3600
Core-3750-1(config-if)#end
Core-3750-1#wr
Building configuration...
[OK]
Core-3750-1#sh interfaces po1
Port-channel1 is up, line protocol is up
(connected)
Hardware is EtherChannel, address is 30e4.dba3.fb17 (bia 30e4.dba3.fb17)
MTU
1500 bytes, BW 2000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is unknown
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/0/23 Gi1/0/24
ARP
type: ARPA, ARP Timeout 01:00:00 //更改老化时间为1小时
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1700
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5
minute input rate 13595000 bits/sec, 2969 packets/sec
5
minute output rate 13102000 bits/sec, 2891 packets/sec
63149839463 packets input, 44233057907548 bytes, 0 no buffer
Received 1581074997 broadcasts (520448426 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 520448426 multicast, 0 pause input
0 input packets with dribble condition detected
74776581352 packets output, 62375504932495 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Core-3750-1#
阅读(384) | 评论(0) | 转发(0) |
0
上一篇:Cisco之show ip arp 与 show mac-address-table
下一篇:HP StorageWorks MSA SAN 存储阵列 - MSA2000 vdisk 和 volume 的扩容
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