November 2013 AOS Release 6.4.6.R01 Release Notes
Layer 3 Features
ISIS IPv6
Intermediate System-Intermediate System (IS-IS) is a shortest path first (SPF) or link-state protocol. IS-IS
is an interior gateway protocol (IGP) that distributes routing information between routers in a single
autonomous system (AS) for IP (IPv4 and IPv6) as well as OSI environments. This feature allows a single
routing protocol to support pure IP and OSI environments, and dual environments. Integrated IS-IS is also
deployed extensively in an IP-only environment.
This release extends the support of ISIS for IPv6.
M-ISIS
Multi-topology (M-ISIS) support is necessary in IS-IS to support network domains in which non-dual stack
IS-IS routers exist. The default protocol behavior of IS-IS is to construct shortest paths through the network
using the routers' MAC addresses with no regard to the different IP address families supported. This
behavior may result in black-holed routing when there are some IPv4-only or IPv6-only routers in an IS-IS
routing domain, instead of all dual-stack routers.
M-ISIS mechanism runs multiple, independent IP topologies within a single IS-IS network domain, using
separate topology-specific SPF computation and multiple Routing Information Bases (RIBs).
M-ISIS is advised in networks containing ISIS enabled routers with a combination of IPv4 and IPv6
capabilities.
Management Features
Enabling or Disabling the Console Session
This feature can be used in security-sensitive networks and deployment by managing the access to the
switch configuration shell through the console port. The feature allows the following operations:
• Enable or Disable the access to the switch configuration shell through the console port.
• Stores the access configuration in the configuration file (boot.cfg) so that even after a reboot the
access to the switch remains the same through console port.
It is recommended to create a back-up of the configuration file before using this feature. If remote access to
the switch is lost (i.e Telnet, SSH, Webview) contact customer support to restore the access.
Note: This feature applies to the primary console port, the secondary port remains active.
Page 12 of 80 OmniSwitch 6850E/6855/9000E—Release 6.4.6.R01
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