Cisco 10000 Series Configuration Manual page 351

A
Authentication, authorization, and accounting.
AAA
List kept by a router to control access to or from the router for a number of services. For example,
Access list
access lists can be used to prevent packets with a certain IP address from leaving a particular interface
on the router.
A status condition that shows that a module or port is experiencing an abnormal operating condition.
Alarm
See also
Automatic protection switching. A SONET switching mechanism that achieves network resiliency by
APS
automatically switching from a primary circuit to a secondary circuit. This switching process occurs if
the primary circuit fails or if the error rate on the primary line exceeds a set threshold. The Cisco 10000
series ESR supports 1+1 APS, which provides permanent electrical bridging to the service and
protection equipment, placed at both ends of the circuit.
B
Bell Communications Research. An organization that performs research and development on behalf of
Bellcore
the Regional Bell Operating Companies (RBOCs).
Bit error rate. The ratio of received bits that contain errors to all received bits.
BER
Border Gateway Protocol. An interdomain routing protocol that replaces EGP. BGP exchanges
BGP
connection information with other BGP systems. It is defined by RFC 1163.
See BER.
Bit error rate
See BGP.
Border Gateway
Protocol
C
Committed Access Rate. A QoS feature that classifies packets based on such things as access lists, a
CAR
MAC address, and IP precedence. It measures traffic rates and can be configured to take actions such
as dropping packets or changing the ToS value.
A modification of the M23 framing method for DS3 which frees the C bits for additional uses. See also
C-bit parity
M23.
OL-8834-04
Critical alarm, Major alarm, and
G L O S S A R Y
Minor alarm.
Cisco 10000 Series Router Line Card Configuration Guide
GL-1