Full-Duplex Communication
You can select half-duplex or full-duplex communication. The advantage of
using full-duplex is that communication packets can flow in both directions
simultaneously, which results in doubling the throughput capacity on the
segment.
Full-duplex communication eliminates the performance degradation resulting
from packet collisions. Packets cannot collide because they each travel on
their own path--like cars going in opposite directions on a two-lane
highway. So while the effective bandwidth to a 10BaseT port configured for
half-duplex Ethernet is a maximum of 10 Mbps, with full-duplex Ethernet it
is doubled to 20 Mbps.
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3ks/3000/acopspcs.htm
Catalyst 5000 Series
Supervisor II engine ports on 10/100 ports on Fast EtherChannel-capable line
cards enable high-speed connectivity between switches, switches and routers,
and switches and servers. Up to four Fast Ethernet ports can be grouped to
provide up to 800 Mbps of load-sharing, redundant, and point-to-point
connections between the Catalyst 5500, 5509, 5505, 5002, and 5000 switches.
To achieve higher bandwidth, Gigabit EtherChannel can be deployed, which
supports up to 8 Gbps (full-duplex) of inter-switch bandwidth, and is
supported across the Catalyst 5000 Family.
http://www.cisco.com/univercd/cc/td/doc/pcat/ca5000.htm
If I connect a server to a swtich full duplex then if only one client
connected with its gig eth card, he can't use 2 gigs. I think they are
writing these manuals incorrectly. Cause you can use 1 gig for sending 1 gig
for receiving. Not 2 gigs sending and receiving. If you say to a customer
that with gig ether channel they can reach up to 8 gigs on 6500 swithes he
will obviously thinks that he can send 8 gig and receive 8 gig not 4 gig RX
for gig TX.
Best regards,
Cisco Breaker
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=47562&t=47562
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