80 MANAGING THE VCN ACCESS CONCENTRATOR
Central Management
This section describes central management.
Overview The management agent in the card, in VCN AC slot 1, performs central
management of the VCN AC through a proprietary protocol. The
management agent supports monitoring and control of all 24 VCN AC
ports.
Figure56 Central Management Message Flow
Starting with hardware release 2.0, management messages between card
1 and the other 23 VCN AC cards are carried over an inter nal serial link.
Central management message flow is displayed in Figure 56. The internal
serial link is not shown in the figure.
In previous releases, management messages between card 1 and the
other 23 VCN AC cards are carried over the Ethernet through the
Ethernet switch to which the VCN AC is connected. The flows in
Figure56 pass through the Ethernet switch to which the VCN AC is
connected. The Ethernet links used by management messages are not
shown in the figure.
There are two user interfaces for central management:
■A terminal emulating computer attached to the LMA port in VCN AC
slot1
■A Telnet session between a management computer and the VCN AC
The user commands cause the Management Agent in VCN AC slot 1 to
issue queries and control messages to all the cards in the VCN AC. The
123 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Queries and
Control Messages
S
tatistics and
Status Messages
Management
Agent
(Slot 1)