[140640] in North American Network Operators' Group
1000BaseT Ethernet keepalives (Ethertype 0x9000)
daemon@ATHENA.MIT.EDU (Manu Chao)
Mon May 16 16:02:10 2011
Date: Mon, 16 May 2011 22:02:01 +0200
From: Manu Chao <linux.yahoo@gmail.com>
To: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
I am curious to understand how copper Ethernet keepalive are used and work
between a host or router and a switch?
Cisco default keepalive is 10 seconds with 3 or 5 retries, does this mean
30s or 50s to detect copper link failure??
I may miss something, thanks for your help.
The link failure detection doesn't occur with optical links because hardware
detection (Rx < Rx_min) is much more real time than keepalive timeout
expiration.
R/
Manu
