Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.3.0 - Page 1154

Packet analysis Use the Linux tcpdump command to analyze network packets. Use filters to limit packet collection and output. You must be logged into the Linux shell to use this command. For more information, seeLog into OS10 Device. Use the Linux tcpdump command without parameters to view packets that flow through all interfaces. To write captured packets to a file, use the -w parameter. To read the captured file output offline, you can use open source software packages such as wireshark. Capture packets from Ethernet interface $ tcpdump -i e101-003-0 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on e101-003-0, link-type EN10MB (Ethernet), capture size 262144 bytes 01:39:22.457185 IP 3.3.3.1 > 3.3.3.4: ICMP echo request, id 5320, seq 26, length 64 01:39:22.457281 IP 3.3.3.1 > 3.3.3.4: ICMP echo reply, id 5320, seq 26, length 64 Capture two packets from interface $ tcpdump -c 2 -i e101-003-0 listening on e101-003-0, link-type EN10MB (Ethernet), capture size 96 bytes 01:39:22.457185 IP 3.3.3.1 > 3.3.3.4: ICMP echo request, id 5320, seq 26, length 64 01:39:22.457281 IP 3.3.3.1 > 3.3.3.4: ICMP echo reply, id 5320, seq 26, length 64 2 packets captured 13 packets received by filter 0 packets dropped by kernel Capture packets and write to file $ tcpdump -w 06102016.pcap -i e101-003-0 listening on e101-003-0, link-type EN10MB (Ethernet), capture size 96 bytes 32 packets captured 32 packets received by filter 0 packets dropped by kernel Port adapters and modules Use the show diag command to view diagnostics information for OS10 port adapters and hardware modules. View diagnostic hardware information OS10# show diag 00:00.0 Host bridge: Intel Corporation Atom Processor S1200 Internal (rev 02) 00:01.0 PCI bridge: Intel Corporation Atom Processor S1200 PCI Express Root Port 1 (rev 02) 00:02.0 PCI bridge: Intel Corporation Atom Processor S1200 PCI Express Root Port 2 (rev 02) 00:03.0 PCI bridge: Intel Corporation Atom Processor S1200 PCI Express Root Port 3 (rev 02) 00:04.0 PCI bridge: Intel Corporation Atom Processor S1200 PCI Express Root Port 4 (rev 02) 00:0e.0 IOMMU: Intel Corporation Atom Processor S1200 Internal (rev 02) 00:13.0 System peripheral: Intel Corporation Atom Processor S1200 SMBus 2.0 Controller 0 (rev 02) 00:13.1 System peripheral: Intel Corporation Atom Processor S1200 SMBus 2.0 Controller 1 (rev 02) 00:14.0 Serial controller: Intel Corporation Atom Processor S1200 UART (rev 02) 00:1f.0 ISA bridge: Intel Corporation Atom Processor S1200 Integrated Legacy Bus (rev 02) 01:00.0 Ethernet controller: Broadcom Corporation Device b850 (rev 03) 02:00.0 SATA controller: Marvell Technology Group Ltd. Device 9170 (rev 12) 03:00.0 PCI bridge: Pericom Semiconductor PI7C9X442SL PCI Express Bridge Port (rev 02) 04:01.0 PCI bridge: Pericom Semiconductor PI7C9X442SL PCI Express Bridge Port (rev 02) 04:02.0 PCI bridge: Pericom Semiconductor PI7C9X442SL PCI Express Bridge Port (rev 02) 04:03.0 PCI bridge: Pericom Semiconductor PI7C9X442SL PCI Express Bridge Port (rev 02) 07:00.0 USB controller: Pericom Semiconductor PI7C9X442SL USB OHCI Controller (rev 01) 1154 Troubleshoot OS10