Technical notes and solutions about GNU/Linux, networking, sysadmin tasks and legacy systems. Real problems, real fixes.
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Mucho tiempo ha sido esperado este título, el contenido del video me hace recordar otro título "Kill Zone", por supuesto los dos juegos tienen muchas diferencias, pero es lo que el video me hace recordar.
Installation of OpenWRT on Linksys EA4500 / N900 1.- It looks like this is very important and you must not skip it!!!! Download/install last oficial firmware by Linksys Ver. 2.1.42 (Build 183584) Latest Date: 9/19/2017 Download 22.6 MB From here: http://downloads.linksys.com/downloads/firmware/FW_EA4500_2.1.42.183584_prod.img Perform the "upgrade" 2.- After the reboot, perform the install of OpenWRT. I'm not sure but my attempts to install the very latest firmware failed, so I used the version mention on this chatroom: https://forum.archive.openwrt.org/viewtopic.php?id=60649&p=1#p304557 Post #21: Edit: that image you're running now might be old enough that you should flash the factory firmware first, then flash with https://downloads.openwrt.org/snapshots … actory.bin . The board name changed from ea4500 to linksys-viper, which will prevent sysupgrade from accepting the .tar image. Link to the file: https://downloads.openwrt.org/snapsh...
If you have to work with Brocade Switches and for some reason you need to find out the ip and/or the mac address of the network interface, you might have to use (at least) two options, depending on the model/firmware version. To find the IP: broc01:FID340:admin> ipaddrshow SWITCH Ethernet IP Address: 1.1.2.4 Ethernet Subnetmask: 255.255.240.0 Gateway IP Address: 1.1.2.1 DHCP: Off To find the MAC address (two options): broc01:FID340:admin> ifmodeshow eth0 but depending on the model/firmware version you might get this output: "This command is deprecated in Fabric OS v8.0.1. Please use command ethif." broc01:FID340:admin> ethif --show eth0 eth0 interface: Link mode: negotiated 100baseTx-FD, link ok MAC Address: 00:F8:72:90:56:36 eth0 Link encap:Ethernet HWaddr 00:F8:72:90:56:36 inet addr:1.1.2.1 Bcast:1.1.2.255 Mask:255.255.2255.0 UP BROADCAST R...
This is a handy way to get a lot of info about the switch/port an interface is connected to. CDP stands for Cisco Discovery Protocol , which is a layer 2 protocol and is used to share information about other directly connected Cisco equipment (WikiPedia). ## ether[20:2] == 0x2000 - Capture only packets that are starting at byte 20, and have a 2 byte value of hex 2000 LLDP stands for Link Layer Discovery Protocol and replaces CDP. LLDP is a vendor-neutral Data Link Layer protocol used by network devices for advertising of their identity, capabilities and neighbours (WikiPedia). ##tcpdump -i eth0 -s 1500 -XX -c 1 'ether proto 0x88cc' The folllowing command shows how to use tcpdump if you ever need switch/port info on a linux host assuming you are connected to a Cisco device: tcpdump -nn -vv -i -s 1500 -c 1 '(ether[12:2]=0x88cc or ether[20:2]=0x2000)' Example: root@arrakis:~ # tcpdump -nn -vv -i eth0 -s 1500 -c 1 '(ether[1...
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