Table Of Contents
Release Notes for Cisco ONS 15302 Release 1.0
Release notes address closed (maintenance) issues, caveats, and new features for the Cisco ONS 15302. For detailed information regarding features, capabilities, hardware, and software introduced with this release, refer to Release 1.0 of the Cisco ONS 15302 Installation and Operations Guide. For the most current version of the Release Notes for Cisco ONS 15302 Release 1.0, visit the following URL:
Cisco also provides Bug Toolkit, a web resource for tracking defects. To access Bug Toolkit, visit the following URL:
Changes to the Release Notes
This section documents supplemental changes that have been added to the Release Notes for Cisco ONS 15302 Release 1.0 since the production of the Cisco ONS 15302 System Software CD for Release 1.0.
There are no changes to the release notes for Release 1.0.
Review the notes listed below before deploying the ONS 15302. Caveats with DDTS tracking numbers are known system limitations that are scheduled to be addressed in a subsequent release. Caveats without DDTS tracking numbers are provided to point out procedural or situational considerations when deploying the product.
DDTS # CSCdz25077
When using the ONS 15302 as a distribution switch connected to an IP multicast router, the ONS 15302 should forward IGMP join and leave packets to the router. However, when operating in basic bridge mode, IGMP join and leave messages are not forwarded to other ports in the VLAN. The ONS 15302 supports dedicated forwarding tables for MAC layer multicast traffic and IGMP snooping. By enabling these features as follows, you can ensure that the IGMP packets are forwarded correctly.
Step 1 To reduce the maximum number of VLANs to less than 4000 and make space available for the MAC multicast tables (this is a one-to-one relation, so for every VLAN you take off, you can have another multicast group entry), enter the commands:
The device reboots.
Step 2 To enable the MAC multicast feature, enter the command:
Step 3 To enable the IGMP snooping feature, enter the command:
Now, when IGMP join messages are received from an end user, the transaction will be registered in the bridge and forwarded to the other ports in the VLAN. The related multicast traffic will now be forwarded only to the bridge port of the received the IGMP join message.
IGMP leave messages will be forwarded only, and the registered IGMP entries in the bridge will time out (default 150 seconds). This issue will be resolved in a future release.
DDTS # CSCdz37795
A LAN port may lose traffic or packets when another LAN becomes congested, or packets otherwise overload the port. For example, connect two ONS 15302s (A and B) back to back. Set up a VLAN between A1 and B1 and another VLAN between A2 and B2. Run all ports in 100 MB mode with flow control on. Offer 30 MB from A1 to B1 and 30 MB from A2 to B2. Then reduce the B1 mode to 10 MB. Packet loss will be observed. To avoid this issue, do not use different speeds on the LAN-ports. Note that if the WAN capacity is lower than the slowest LAN-port, the issue will not occur (flow control will work). This issue will be resolved in a future release.
DDTS # CSCdz22948
The ONS 15302 cannot be provisioned with the same IP subnet on its management interfaces; for example, the management port and one or more of the DCC channels. All IP interfaces must be provisioned with a dedicated IP subnet. Introducing an ONS 15302 into an ONS 15454 topology where all the ONS 15454 management interfaces are on the same subnet, only one management interface of the ONS 15302 can be provisioned on that subnet. To work around this, provision the "ONS 15454 subnet" for the "A-DCC-R" interface, and provision a different subnet to the management port of the ONS 15302. This issue will be resolved in a future release.
DDTS # CSCdz26587
There is no immediate connectivity when managing an ONS 15302 via an ONS 15454 running proxy ARP. Add static routes on the management station or PC to work around this issue. This issue will be resolved in a future release.
DDTS # CSCdz26606
During failure in an ONS 15454 ring where static routes have been provisioned over the link that fails, the ONS 15302 loses connectivity due to an inability to interoperate with OSPF. If the ONS 15454 allows more than one static route to the same destination, but through different interfaces, then "back-up" routes can be provisioned to avoid this issue. This issue will be resolved in a future release.
DDTS # CSCdz34676
AIS is not transmitted to the E1 customer side after an LOSS on the far end. This is standard behavior according to PRA specification ETS 300-233. This caveat is informational only, and no change is planned for the ONS 15302.
Resolved Caveats for Release 1.0
Because Release 1.0 is a first release, there are no resolved caveats.
New Features and Functionality
This section highlights new features and functionality for Release 1.0. Because Release 1.0 is a first release, there are no new features or functionality. For an overview of features of the 15302, consult the Cisco ONS 15302 Installation and Operations Guide, Release 1.0.
•Cisco ONS 15302 Quick Installation Guide, Release 1.0
•Cisco ONS 15302 Installation and Operations Guide, Release 1.0
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