Hi, according to Cisco documentation(for example http://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/nm/hardware/installation/guide/conntge.pdf) 1000BASE-T ports can not be looped back through use of an external loopback cable. This should be because of NEXT cancellation implemented in 1000BASE-T phy. Is there a way to disable this on newer Catalyst or Nexus brand switches so that one could use RJ45 loopback cable on 1000BASE-T ports?
thanks, Martin _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
