Switch Router Adapter Owner's Manual

Introduction to the SP Switch Router Adapter card
Upgrading system memory
SP Switch Router Adapter Guide - 1.4 Update 2 October 22, 1999 1-5
Upgrading system memory
Figure 1-2 shows the area of system memory (control board RAM) that can be expanded to
meet site requirements. Memory upgrades are made in 128MB increments up to 512MB.
Figure 1-2. Expandable area of system memory
This chart provides general guidelines for memory required in different routing environments.
Although the figures assume BGP peers with 50K route entries, additional memory may be
required for higher average numbers of routes per BGP peer.
If the SP Switch Router is to support dynamic routing or ATMP home agents and mobile
nodes, upgrade to at least 256MB. In environments where large numbers of routes are
advertised, upgrade to 512MB.
128MB RAM
32MB
8-12MB
84MB
- system software
- config files
- GateD binary
- route tables
- kernel runs
- GateD runs
= expandable area of RAM
(fixed size)
(fixed size)
- ATMP tunnels
Memory
size and
organization
256MB
- log files
212MB
340MB
468MB
RAM
--> 384MB
RAM
--> 512MB
RAM
expandable to -->
Customer
profile
Amount of
control
board
memory
needed
Space for
dynamic
routing,
ATMP
tables
Route
entries
on
media
card
Route
entries in
dynamic
routing
database
Typical
numbe
r of
peer
sessions
Static routing:
(in high-performance
environment)
128MB 84MB 150K Typical
number:
35,800
0
Small POP 256MB 212MB 150K Typical
number:
199,000
3
Medium POP /
ISP backbone
384MB 340MB 150K Typical
number:
362,000
9
Large POP /
Exchange point /
Route reflection server
512MB 468MB 150K Typical
number:
521,000
12