Cisco ONS 15327 Manual page 24

New Features and Functionality
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Node Diversity
Release 3.3 supports node diversity as an option during automated circuit provisioning across UPSR
segments in a mesh (PPMN) network. This option does not apply to 1:1, unprotected, and BLSR portions
of the network. Node diversity means that, except for the source and destination, the circuit's working
and protect paths do not traverse any of the same nodes. This feature ensures that the failure of a single
node will not eliminate the benefit of SONET protection.
DHCP Relay Support
Release 3.3 allows Dynamic Host Configuration Protocol (DHCP) requests/responses to traverse the
ONS 15327 network. This allows craft PCs to request and receive appropriate IP addresses. In addition,
the combination of DHCP relay and Proxy ARP allows the craft PC to work without any ONS 15327 or
PC configuration in most subnetting environments. In combination with static route support, the craft
PC can work with an ONS 15327 even when multiple nodes on the same DCC share a subnet and other
crafts are connected. DHCP relay support includes support for User Datagram Protocol (UDP) and
listening on Port 67 (the standard BOOTP/DHCP port). DHCP relay is configured as "on" or "off" in
CTC; the default is "off."
Lamp Test
You can activate ONS 15327 lamp tests from CTC. When the test is invoked, all ONS 15327 LEDs
illuminate at the same time for 10 seconds. Bicolored LEDs cycle from green to yellow.
Improved Management Routing
The following improvements have been made to management routing:
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Release Notes for Cisco ONS 15327 Release 3.3
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CTC supports the ability to cross connect an STM circuit to an appropriate size STS circuit (for
example, STM1 to STS-3C).
CTC circuit management functionality provides for SDH circuits.
To provision an SDH circuit, an appropriate STS-N circuit is defined. The section and line
information on the inbound signal will be terminated. The STS-N carries the SDH path information
and SDH payload. At the SDH handoff, SDH section and line header information is reintroduced so
that an SDH signal departs.
Route advertisement over LAN interface: the surface mechanism (OSPF) eliminates the need to add
to static route tables in an affiliate router when a Cisco ONS ring is deployed. Only the node IP
address is sent to external systems via OSPF; IP addresses on cards are not sent. You can configure
OSPF so that node IPs are not sent. The default configuration is off (not advertising OSPF).
Craft attachment: Craft attachment and management of all nodes on a DCC (regardless of
subnetting) without the addition of static routes to the craft PC is now possible. Automatic Host
Detection and Proxy Server are supported to provide this capability. Multiple craft attachments to
the same DCC can occur at the same time.
Route learning and aging support: redundant physical connections to an ONS 15327 ring are
supported, including rerouting messages through an alternate route and/or an alternate ONS 15327
gateway. Nodes can reroute messages (including the primary and secondary gateway nodes). This
feature is not affected by subnet configuration (all nodes on one subnet, all nodes on different
subnets, or any combination).
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