Ok, The situations is this... Router 3825 running 12.4(24)T5 advipsrv., with several VRFs. Each vrf is connected to a different modem, configured in a different service.
The router has configured several IP SLAs... icmp, http, and off course ftp. All those probes are being monitored over SNMP to obtain perfomance metrics. The issue is related with the IP SLA FTP... For an unknown reason is mostly failing, from the output of "ip sla stats 50", the line "Number of failures" is not 0. Well, said that, it could be and end-to-end issue... I discarded it, there is no packet loss between the remote router and the ftp server. The weird thing is... I am downloading a 5MB.zip file which is exacly... -rwxrwxrwx 1 aaaa aaaa 5242880 Apr 14 2011 5MB.zip The log of the FTP server (pure-ftpd) is showing... cat /var/log/syslog | grep bytes Oct 7 16:19:48 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/possiblesources.pcap downloaded (1705710 bytes, 105.25KB/sec) Oct 7 16:25:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 97.14KB/sec) Oct 7 16:35:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 97.24KB/sec) Oct 7 16:45:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2490368 bytes, 96.52KB/sec) Oct 7 16:55:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 97.52KB/sec) Oct 7 17:05:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 98.08KB/sec) Oct 7 17:15:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2490368 bytes, 96.54KB/sec) Oct 7 17:25:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 98.38KB/sec) Oct 7 17:35:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 96.98KB/sec) Oct 7 17:45:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2490368 bytes, 96.48KB/sec) Oct 7 17:55:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2359296 bytes, 86.69KB/sec) Oct 7 18:05:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2490368 bytes, 96.06KB/sec) Oct 7 18:15:23 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 99.28KB/sec) Oct 7 18:25:23 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 96.46KB/sec) Oct 7 18:35:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 97.27KB/sec) Oct 7 18:45:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2490368 bytes, 95.46KB/sec) Oct 7 18:55:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 97.22KB/sec) Oct 7 19:05:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2490368 bytes, 94.53KB/sec) Oct 7 19:15:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2490368 bytes, 96.48KB/sec) Oct 7 19:25:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2490368 bytes, 93.80KB/sec) Oct 7 19:35:23 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 97.53KB/sec) Oct 7 19:45:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2490368 bytes, 96.46KB/sec) Oct 7 19:55:22 DEV012002 pure-ftpd: ([email protected]) [NOTICE] //home/aaaa/5MB.zip downloaded (2621440 bytes, 98.43KB/sec) The router never downloads the complete file. Futher more, the sniffer capture shows multiple RST, then FP, more RST, in that order, from router to the ftp. Other info is... Timeout for SLA operation is big enough to download the file, that was checked manually. FTP passive is always used, and it is working fine too, checked manually too. any idea? _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
