It may take 30 seconds or more to connect a computer to a vswitch before the computer can communicate over the network. If you are waiting for a long time, 30 seconds of waiting will make you feel very long. Let's take a look at how to accelerate the port initialization process of the switch. Measure the test taker's understanding about the port initialization process.
It may take 30 seconds or more to connect a computer to a vswitch before the computer can communicate over the network. If you are waiting for a long time, 30 seconds of waiting will make you feel very long. Let's take a look at how to accelerate the port initialization process of the switch. Measure the test taker's understanding about the port initialization process.
When a computer is connected to one
VswitchIt may take 30 seconds or more for the computer to communicate over the network. If you are waiting for a long time, 30 seconds of waiting will make you feel very long. Let's take a look
HowTalent
Acceleration
VswitchOf
Port
Initialization
Process.
Understanding
Vswitch
Port
InitializationProcess
When the device is connected to
VswitchOf
Port,
Vswitch
PortGenerally, it goes through four steps. Let's take a closer look.
Spanning Tree Protocol (STP)
Initialization
STP is an IEEE 802.1d protocol that prevents loops in a LAN. Test this
Vswitch
PortIt is necessary. When STP is started, a loop is formed in the LAN. If a hub,
VswitchOr a router, STP is out-of-band important. On the other hand, if a computer, printer, server, or laptop is connected, STPS
Initialization
ProcessNo.
In STP
InitializationStage stage,
PortIt will go through five stages of STP: blocking, listening, learning, forwarding, and failure. The entire process takes 15 seconds. Therefore, if you are sure what you want to connect to, you can terminate this process.
Test the Ethernet Channel Configuration
The next process is to test the Ethernet channel.
Vswitch
PortBind them together to provide more Ethernet connections. If one channel fails, the Ethernet channel usually provides redundancy. This process is used
PortThe aggregation protocol (PAgP) takes about 15 seconds.
Trunk configuration test wired and wireless networks
Next,
VswitchStart testing this
PortTrunk or not
Port(
VswitchInterconnected
Port). TRUNKING
Vswitch
PortTo exchange data between multiple VLANs. For Trunk
PortOf course, you can disable it and save 1 or 2 seconds.
Vswitch
PortAdaptive speed and full duplex
Finally,
Vswitch
PortThe entry speed and full-duplex automatic handshake. For example,
Vswitch
PortSupports 1000 Mb (1 Gb) Full Duplex speed, but the client only supports Mb full duplex.
VswitchThe maximum rate at which the customer can automatically negotiate with each other.
You can
Vswitch
InitializationThis process is hard coded to save time. However, this is not always a good choice, because it may not know how fast the client supports. This adaptive time is not long, so consider carefully if you want
Vswitch
PortWhether the time required for hard coding is worthwhile.
Now we have reviewed
Vswitch
Port
InitializationIn different stages, let's see how much time can be saved.
Perform the following steps:
VswitchSave more than 30 seconds
Port
InitializationTime:
Set
Vswitch
PortSet to Access mode. This can cancel Trunk negotiation and block
PortEnter the Ethernet channel for negotiation. This can be
InitializationThe process is reduced by 15 seconds.
Configure PortFast. This can block
PortStart STP negotiation and save another 15 seconds.
The following is an example:
Switch(config)# int fa0/21Switch(config-if)# switchport mode accessSwitch(config-if)# spanning-tree portfast%Warning: Only enable PortFast on ports connected to a single host.Connecting hubs, concentrators, switches, bridges, etc. to thisinterface when you've PortFast can cause temporary bridging loops.Use with CAUTION.%This has configured PortFast on FastEthernet0/21 but will onlyhave an effect when the interface is in a non-trunking mode.Switch(config-if)# no shutdownSwitch(config-if)#
You can also
PortFor example:
Switch(config)# int range fastEthernet 0/1 - 24Switch(config-if-range)# switchport mode accessSwitch(config-if-range)# spanning-tree portfast
If needed, you can also set it manually.
Vswitch
PortSpeed, saving a little time. The following is an example.
Switch(config-if)# speed 100Switch(config-if)# duplex full
Disable STP
Initialization, Trunk negotiation. The Ethernet channel negotiation can be
Initialization
ProcessSaves 30 seconds. In addition, you can use the Range Command of the interface to set
VswitchAll
Port.
