Cisco SGE2000 Configuration Guide - Page 28

Functionality, Number of links, Redundancy, Information About Link Continuity

Get Cisco SGE2000 PDF manuals and user guides View all Cisco SGE2000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 28 highlights

Information About Topology Considerations Chapter 3 Information About Topology • Link continuity - How should the SCE 2000 respond to platform failure with regard to link continuity? Should traffic flow continue even though the unit is not operating, or be halted until the platform is repaired/replaced? These issues determine three important aspects of system deployment and configuration: • How many SCE 2000 Platforms are needed and how will they be installed? • Physical topology of the system - The actual physical placement of the SCE 2000 in the system. • Topology-related configuration parameters - The correct values for each parameter must be ascertained before configuring the system to make sure that the system will function in the desired manner. Functionality The SCE 2000 can serve one of two general functions: • Monitoring and Control - The SCE 2000 monitors and controls traffic flow. Decisions are enforced by the SCE 2000 depending on the results of the monitoring functions of the SCE 2000 and the configuration of the Service Control Application for Broadband or Mobile solution. In order to perform control functions, the SCE 2000 must be physically installed as an inline installation and the connection mode must be "inline". • Monitoring only - The SCE 2000 monitors traffic flow, but cannot control it. Either an inline installation or an optical splitter installation may be used for monitoring only. In the latter case connection mode must be "receive-only". Number of links The SCE 2000 can be deployed in a single GBE link or in two GBE links. The two-link topology may implement load-sharing and the SCE 2000 in this case is able to process both directions of a bi-directional flow even if they split to both links. Redundancy When a high degree of reliability is desired, a second SCE 2000 Platform should be installed to provide backup operation capabilities. The combination of two SCE 2000 s guarantees uninterrupted functioning in case of a failure of one of the platforms. The two SCE 2000 s are cascaded, so that, although all processing is performed only in the active SCE 2000 , the standby SCE 2000 is constantly updated with all the necessary information so that it can instantly take over processing the traffic on the data links should the active SCE 2000 fail. If only preservation of the network links is required, and uninterrupted functionality of the SCE 2000 is not required, a single SCE 2000 is sufficient. Information About Link Continuity The bypass mechanism of the SCE 2000 allows traffic to continue to flow, if desired, even if the device itself is not functioning. Cisco SCE 2000 4xGBE Installation and Configuration Guide 3-2 OL-7824-06

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
3-2
Cisco SCE 2000 4xGBE Installation and Configuration Guide
OL-7824-06
Chapter 3
Information About Topology
Information About Topology Considerations
•
Link continuity — How should the
SCE 2000
respond to platform failure with regard to link
continuity? Should traffic flow continue even though the unit is not operating, or be halted until the
platform is repaired/replaced?
These issues determine three important aspects of system deployment and configuration:
•
How many
SCE 2000
Platforms are needed and how will they be installed?
•
Physical topology of the system — The actual physical placement of the
SCE 2000
in the system.
•
Topology-related configuration parameters — The correct values for each parameter must be
ascertained before configuring the system to make sure that the system will function in the desired
manner.
Functionality
The
SCE 2000
can serve one of two general functions:
•
Monitoring and Control — The
SCE 2000
monitors and controls traffic flow. Decisions are enforced
by the
SCE 2000
depending on the results of the monitoring functions of the
SCE 2000
and the
configuration of the Service Control Application for Broadband or Mobile solution.
In order to perform control functions, the
SCE 2000
must be physically installed as an inline
installation and the connection mode must be “inline”.
•
Monitoring only — The
SCE 2000
monitors traffic flow, but cannot control it.
Either an inline installation or an optical splitter installation may be used for monitoring only. In the
latter case connection mode must be “receive-only”.
Number of links
The
SCE 2000
can be deployed in a single GBE link or in two GBE links. The two-link topology may
implement load-sharing and the
SCE 2000
in this case is able to process both directions of a
bi-directional flow even if they split to both links.
Redundancy
When a high degree of reliability is desired, a second
SCE 2000
Platform should be installed to provide
backup operation capabilities. The combination of two
SCE 2000
s guarantees uninterrupted
functioning in case of a failure of one of the platforms. The two
SCE 2000
s are cascaded, so that,
although all processing is performed only in the active
SCE 2000
, the standby
SCE 2000
is constantly
updated with all the necessary information so that it can instantly take over processing the traffic on the
data links should the active
SCE 2000
fail.
If only preservation of the network links is required, and uninterrupted functionality of the
SCE 2000
is not required, a single
SCE 2000
is sufficient.
Information About Link Continuity
The bypass mechanism of the
SCE 2000
allows traffic to continue to flow, if desired, even if the device
itself is not functioning.