Estandares 802.Xxx Cisco 642 812

IEEE
802.1D Spanning Tree Protocol (STP)
802.1x Port based authentication
802.3 Ethernet
802.3u Fast Ethernet
802.3z Gigabit Ethernet
802.3ab Gigabit Ethernet over Coopper
802.3ae Ten Gigabit Ethernet
802.1Q ID VLAN (open standard)
802.3ad Link Aggregration Protocol (LAgP)
802.1w Rapid Spanning Tree Protocol (RSTP)
802.1s Multiple Spanning Tree (MST)
802.3af Power over Ethernet openstandard
802.3at PoE Plus open standard
802.11 Wireless LAN
802.3z Gigabit Ethernet over Fiber Optic



By default, idle CAM table entries are
kept for 300 seconds before they are deleted.

By default, MAC addresses are learned dynamically from incoming frames

If duplex autonegotiation
fails, a switch port always falls back to its default setting: half-duplex.

Fast Ethernet 10/100ports can be set to speeds of 10, 100, and Auto (the default) for autonegotiate
mode. Gigabit Ethernet GBIC ports always are set to a speed of 1000, whereas
1000BASE-T ports can be set to speeds of 10, 100, 1000, and Auto (the default).

Fast Ethernet 10/100 ports can be set to speeds of 10, 100, and Auto (the default) for autonegotiate
mode. Gigabit Ethernet GBIC ports always are set to aspeed of 1000, whereas
1000BASE-T ports can be set to speeds of 10, 100, 1000, and Auto (the default).

By default, ports put into the errdisable state must be re-enabled manually

If any errdisable causes are configured for automatic recovery, the errdisabled port stays
down for 300 seconds, by default

By default,
all switch ports are assigned to VLAN 1, are set to be a VLAN type ofEthernet, and
have a maximum transmission unit (MTU) size of 1500 bytes.

VLANs 1002 to 1005 are reserved for legacy functions
related to Token Ring and FDDI switching.

VLANs always are referenced by a
VLAN number, which can range from 1 to 1005

Catalyst IOS switches also can support extended-range VLANs, in which the VLAN number
can be 1 to 4094, for compatibility with the IEEE 802.1Qstandard. The extended
range is enabled only when the switch is configured for VTP transparent mode with the
vtp mode transparent global configuration command

the default VLAN name is
of the form VLAN XXX, where XXX represents the VLAN number

By default,
every Catalyst IOS switch port is ready for Layer 3 operation

By default, all switch ports in Layer 2 mode are nontrunking and operateas access links
until some intervention changes the mode. Specifically, ports actively try to become
trunks as long as the far end agrees. In that case, a common encapsulation is chosen, favoring
ISL if both support it

negotiate (the default)—The encapsulation is negotiated to select either ISL or
IEEE 802.1Q, whichever both ends of the trunk support. If both ends support both
types, ISL isfavored

By default, an 802.1Q trunk uses VLAN 1 as the native VLAN.
In the case of an ISL trunk, using this command has no effect because ISL doesn’t support
an untagged VLAN.

By default, a switch transports all active VLANs (1 to 4094) over a trunk
link.

In the switchport mode command, you can set the trunking mode to any of the following: trunk; dynamic desirable; dynamic auto (thedafault)

In all these modes, DTP frames are sent out every 30 seconds to keep neighboring
switch ports informed of the link’s mode

By default, a trunk allows all VLANs to be transported across it.

By default,
a switch is in VTP server mode.

By default, management domains are set to use nonsecure advertisements without a password

By default, every switch operates in VTP server modefor the management domain NULL
(a blank string), with no password or secure mode. If the switch hears a VTP summary advertisement
on a trunk port from any other switch, it automatically learns the VTP domain
name, VLANs, and the configuration revision number it hears

VTP version 1 is the default protocol on a switch

By default, VTP pruning is disabled on IOS-based switches

By...