CISCO未公开的命令2
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With show ip ospf statistics you get detail informations about OSPF SPF. You can see the reasons for SPF and the calculation times:
London#show ip ospf statistic
Area 0: SPF algorithm executed 15 times
SPF calculation time
Delta T Intra D-Intra Summ D-Summ Ext D-Ext Total Reason
00:45:02 32 0 0 0 0 0 36 R,
00:41:00 28 0 0 0 0 0 28 R, N,
00:40:50 28 0 0 0 0 0 28 R,
00:38:13 28 0 0 0 4 0 32 R, X
00:34:18 24 0 0 0 4 0 32 R, N,SN,SA,X
00:07:37 24 0 0 0 0 0 36 R,
00:05:18 308 0 4 0 28 0 356 R,
00:04:05 24 0 0 0 4 0 28 R,
00:01:31 24 0 4 0 0 0 36 R,
00:01:21 24 0 0 4 0 0 36 R,
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With debug ip ospf monitor you can monitor the OSPF SPF.
London#deb ip ospf monitor
OSPF spf monitoring debugging is on
2d04h: OSPF: 192.168.181.2 address 192.168.181.193 on TokenRing0 is dead, state DOWN
2d04h: OSPF: Schedule SPF in area 0
Change in LS ID 0.0.0.0, LSA type R,
2d04h: OSPF: schedule SPF: spf_time 0ms wait_interval 187489656s
2d04h: %SYS-5-CONFIG_I: Configured from console by console
2d04h: OSPF: Start redist-scanning
2d04h: OSPF: Scan for redistribution
2d04h: OSPF: End scanning, Elapsed time 0ms
2d04h: %LINK-5-CHANGED: Interface TokenRing0, changed state to administratively down
2d04h: OSPF: Begin SPF at 0xB2CF100ms, process time 360ms
2d04h: spf_time 0ms, wait_interval 187489656s
2d04h: OSPF: End SPF at 0xB2CF120ms, Total elapsed time 32ms
2d04h: Intra: 24ms, Inter: 0ms, External: 0ms
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Start a TCP data server/receiver for TCP performance testing between two Cisco 7500 router:
sh ver
Cisco Internetwork Operating System Software
IOS (tm) RSP Software (RSP-JSV-M), Version 12.0(7), RELEASE SOFTWARE (fc1)
Router#ttcp
transmit or receive [receive]: transmit
Target IP address: 1.1.1.1
perform tcp half close [n]:
send buflen [8192]:
send nbuf [2048]:
bufalign [16384]:
bufoffset [0]:
port [5001]:
sinkmode [y]:
buffering on writes [y]:
show tcp information at end [n]:
ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp -> 1.1.1.1
%Connect failed: Destination unreachable; gateway or host down
Router#ttcp
transmit or receive [receive]:
perform tcp half close [n]:
receive buflen [8192]:
bufalign [16384]:
bufoffset [0]:
port [5001]:
sinkmode [y]:
rcvwndsize [4128]:
delayed ACK [y]:
show tcp information at end [n]:
ttcp-r: buflen=8192, align=16384/0, port=5001
rcvwndsize=4128, delayedack=yes tcp
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