Enterasys csx150 Betriebsanweisung
USER’S GUIDE
274 CyberSWITCH
O
VER
-
SUBSCRIPTION
T
IMER
Over subscription is the situation in which there are more next-hop routers on the WAN that need
updates than there are channels available. When a WAN circuit goes down, a delay (per the over-
subscription timer) is incorporated in marking the routes unreachable. This allows the calls to time-
multiplex over the limited channels. Valid range for timer: 1 to 10,000 seconds; default: 180 seconds.
updates than there are channels available. When a WAN circuit goes down, a delay (per the over-
subscription timer) is incorporated in marking the routes unreachable. This allows the calls to time-
multiplex over the limited channels. Valid range for timer: 1 to 10,000 seconds; default: 180 seconds.
T
RIGGERED
RIP/SAP B
ACKGROUND
I
NFORMATION
When there are a large number of remote destinations, the manual configuration of static routes
and services over WAN circuits can pose a burden on system management. Yet running RIP/SAP
could also be problematic; since these are broadcast protocols, periodic broadcasts may not be
feasible due to cost and bandwidth considerations. Enabling the Triggered RIP/SAP feature allows
the CyberSWITCH to send information on the WAN only when there has been an update to the
database or a change in the reachability of a next-hop router.
and services over WAN circuits can pose a burden on system management. Yet running RIP/SAP
could also be problematic; since these are broadcast protocols, periodic broadcasts may not be
feasible due to cost and bandwidth considerations. Enabling the Triggered RIP/SAP feature allows
the CyberSWITCH to send information on the WAN only when there has been an update to the
database or a change in the reachability of a next-hop router.
Specifically, triggered RIP and SAP updates are only transmitted on the WAN:
•
•
when a specific request for a routing/service update has been received;
•
when the routing or service databases are modified by new information from another interface
(in which case, only the latest changes are sent);
(in which case, only the latest changes are sent);
•
when a destination has changed from an unreachable to a reachable state; and
•
when the unit is powered up.
You may customize triggered RIP/SAP operation to your system’s specific needs through the
global timers. The global timers are user-controlled; they are described in detail in the Configuration
Elements section (
global timers. The global timers are user-controlled; they are described in detail in the Configuration
Elements section (
), and include the following:
•
database timer
•
hold-down timer
•
retransmission timer
•
polling timer
•
over-subscription timer
IPX-S
PECIFIC
I
NFORMATION
FOR
D
EVICES
Note:
chapter contains general information needed to
configure on-node device entries. The following sections provide instructions for entering
on-node device information specific to IPX routing and/or bridging using the IPX Remote
LAN interface.
on-node device information specific to IPX routing and/or bridging using the IPX Remote
LAN interface.
C
ONFIGURING
IPX D
EVICES
WAN D
EVICES
U
SING
CFGEDIT
1.
Select Security from the main menu.
2.
Select Device Level Databases from the security menu.
3.
Select On-node Device Entries from the authentication database menu.