Information Technology Reference
In-Depth Information
measure the time, then to turn off PAgP and measure the time, and then to turn off trunking and measure
the time. Finally, we turn off autonegotiation and measure the time. All these tests will be done on a
Catalyst 5000 with a 10/100 Fast Ethernet card that supports DTP and PAgP.
Turning on PortFast is not the same thing as turning off the Spanning-Tree Protocol (as
noted earlier in the document). With PortFast on, the Spanning-Tree Protocol is still
running on the port; it just skips blocking, listening, and learning, and goes immediately to
the forwarding state. Turning off the Spanning-Tree Protocol is not recommended because
it affects the entire VLAN and can leave the network vulnerable to physical topology loops,
which can cause serious network problems.
Note
Show the switch IOS version and configuration (
show version
,
show module
).
Step 1
Switch-A (enable)
show version
WS-C5505 Software,
Version McpSW: 4.5(1) NmpSW: 4.5(1)
Copyright (c) 1995-1999 by Cisco Systems
NMP S/W compiled on Mar 29 1999, 16:09:01
MCP S/W compiled on Mar 29 1999, 16:06:50
System Bootstrap Version: 3.1.2
Hardware Version: 1.0 Model: WS-C5505 Serial #: 066507453
Mod Port Model Serial # Versions
--- ---- ---------- --------- ----------------------------------------
1 0
WS-X5530 006841805 Hw : 1.3
Fw : 3.1.2
Fw1: 3.1(2)
Sw : 4.5(1)
2 24 WS-X5225R 012785227 Hw : 3.2
Fw : 4.3(1)
Sw : 4.5(1)
DRAM FLASH NVRAM
Module Total Used Free Total Used Free Total Used Free
------ ------- ------- ------- ------- ------- ------- ----- ----- -----
1
32640K 13648K 18992K 8192K 4118K 4074K 512K 119K 393K
Uptime is 28 days, 18 hours, 54 minutes
Switch-A (enable)
show module
Mod Module-Name Ports Module-Type Model Serial-Num Status
--- ------------------- ----- --------------------- --------- --------- -------
1
0
Supervisor III
WS-X5530 006841805 ok
2
24
10/100BaseTX Ethernet
WS-X5225R
012785227 ok
Mod MAC-Address(es) Hw Fw Sw
--- -------------------------------------- ------ ---------- -----------------
1 00-90-92-b0-84-00 to 00-90-92-b0-87-ff 1.3
3.1.2
4.5(1)
2 00-50-0f-b2-e2-60 to 00-50-0f-b2-e2-77 3.2
4.3(1)
4.5(1)
Mod Sub-Type Sub-Model Sub-Serial Sub-Hw
--- -------- --------- ---------- ------
1 NFFC
WS-F5521 0008728786 1.0
