Shared Flashcard Set

Details

1.1.b - L2 Protocols
Cisco-CCIE
15
Computer Networking
Professional
02/12/2017

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Cards

Term
comand to enable udld on an interface and ensure it is disabled if a unidirectional link is detected.
Definition
udld port aggressive
Term
is udld a standard or cisco proprietary protocol.
Definition
cisco proprietary
Term
how are unidirectional links disabled by UDLD?
Definition
using errdisable, this means interfaces can recover if configured to do so.
Term
2 udld modes
Definition
aggressive - will try to re-establish lost neighbor before sending port to errdisable.

Normal - will mark port as undetermined if neighbor is lost.
Term
what mechanism does udld use to detect unidirectional links
Definition
its own keepalive mechanism.
Term
commands to enable udld on all fibre interfaces.
Definition
udld enable
udld aggressive
Term
command to view cdp info
Definition
show cdp
Term
commands to set cdp timers to default
Definition
cdp timer 60
cdp holdtime 180
Term
command to see info of neighboring device, including IP address.
Definition
sh cdp nei det
Term
global command to enable cdp globally (on by default)
Definition
cdp run
Term
command to enable cdp on an interface
Definition
cdp enable

useful when you don't want to enable all interfaces.
Term
what is 802.1ab
Definition
lldp
Term
command to enable lldp globally (disabled by default)
Definition
lldp run
Term
commands to allow the sending and receiving of lldp messages on an interface (default, when enabled globally)
Definition
lldp transmit
lldp receive
Term
global commands to set lldp timers to their default settings
Definition
lldp holdtime 120 lldp reinit 2 lldp timer 30
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