Installation manual

Part No. T0249-01, Rev A
April, 2002
Known Software Limitations Page 28 of 55
Known Software Limitations
Introduction This section lists limitations known to exist in 6.0 Point Release 01B
Applications Ware software.
RTP Header
Compression
RTP Header Compression Interoperability Between Cisco and
Vanguard Managed Solutions Products over Frame Relay Limitations
Incompatible Cisco Features- There are a few Cisco proprietary features that must be
disabled in order to ensure proper interoperability over Frame Relay links. The table
below identifies the incompatible features.
Protocols Not Supported - Vanguard Frame Relay links configured for CENCAP
encapsulation do not support Transparent Bridging traffic.
Configuration - The “Number of Session to be Compressed” parameter must not be
configured to a value greater than 255 when the encapsulation is configured to
“CENCAP”. Cisco products are limited to 8-bit Context Identifiers (CIDs) over
Frame Relay. Configuring a Vanguard node for more than 255 sessions will cause it
to use 16-bit CIDs.
Vanguard Embedded Web Navigator Point Release Limitation
Vanguard Embedded Web Navigator (the web management tool that allows web
management through an internet browser) is not available with release 6.0.P01B.
Feature Comments
tcp header-compression Vanguard Managed Solutions products do not
support tcp header compression over Frame Relay.
TCP header compression must be disabled on
Cisco Frame Relay interfaces.
Frame relay end-to-end
keepalives
Encapsulation for keep alive packets is Cisco
proprietary and as a result is not supported on links
between Vanguard Managed Solutions and Cisco
nodes.
Cisco discovery protocol CDP must be disabled on links connected to
non-Cisco devices.