clock rate 8000000?

workfrom925

The text book always used clock rate 64000 for serial connections between routers. I did "clock rate ?" and see it has a big range. I tried the highest speed of 8000000 on my home lab and it works. So is there a reason that text books always use 64000?

Since speed is important, should we use the highest clock rate at a work environment?


HQ(config-if)#clock rate ?
Speed (bits per second)
1200
2400
4800
9600
14400
19200
28800
32000
38400
56000
57600
64000
72000
115200
125000
128000
148000
192000
250000
256000
384000
500000
512000
768000
800000
1000000
1300000
1600000
2000000
2600000
3200000
4000000
5300000
8000000

NetworkVeteran

The clock rate is set on the DCE side, i.e., by your service provider. In a real work environment, you wouldn't normally set the clock rate, and your service provider would set the clock rate dependent on how much you paid them.

WilyOne

Yes and understand that there's a difference between acceptable values (what's listed above) and realistic values. An 8 Mb serial connection may work within your lab with very short cable runs and no intervening equipment, but an actual WAN link rated at that speed would cost an arm and a leg.