Release Notes

Release Notes for Cisco ONS 15454 SDH Release 4.1.3

OL-4984-01

Caveats

DDTS # CSCec46228

Rarely, traffic on the DS3i-N-12 card might incur a hit when the active TCC2 is pulled. Removing the

active TCC2 can cause timing hits and disrupt communication between cards, causing protection

switches. To avoid this issue, instead of pulling the active TCC2, issue a manual switch, then pull the

TCC2 once it has become standby. This issue will be resolved in Release 4.6.

Interoperability with SONET DS3i-N-12

When provisioning circuits in SDH to interoperate with SONET DS3i-N-12, you must create a VC4

containing VC3s as a payload in the exact order in which they will attach to port groups on the SONET

side.

DDTS # CSCeb19055

On the subsequent 3 slots occupied by the protect FMEC, MEA is not set when a mismatched IO card is

inserted. This issue will be resolved in a future release.

DDTS # CSCea52722

With DS3-I cards in a 1:2 protection group, when the protect card is active and in the WTR condition,

removing another working card from the protection group clears the WTR condition. To work around

this issue, remove the working card from the protection group when the protect card is in the standby

state. This issue will be resolved in a future release.

DDTS # CSCea60715

In a 1+1 configuration, traffic may be lost upon reset of both working and protect STM64 cards. If you

reset the protect card and then, before the protect card completes rebooting, reset the working card, the

traffic does not switch to protect but remains on working. If the working card is removed during the time

the protect is still coming up, the traffic does not switch to working and is lost. To avoid this issue, wait

for the protect to fully come up before pulling the work card. This issue will be resolved in a future

release.

DDTS # CSCeb39337

Very rarely, DS3i can lose traffic on an active XC-VXL pull. To avoid this issue, side switch the

XC-VXL cards. This issue will be resolved in a future release.

DDTS # CSCeb34655

Very rarely, E1-42 takes greater than 2 second hits on an active XC-VXL pull. To avoid this issue, side

switch the XC-VXL cards. This issue will be resolved in a future release.

DDTS # CSCeb43397

Rarely, E1-42 cards may incur a greater than 60 ms traffic disruption during protection switches. This

can occur when you pull the active working E1-42 card. This issue will be resolved in a future release.