Fixes are available
APAR status
Closed as program error.
Error description
CiscoMPLSTelnet agent can not log into device with SSHv2 tested with ITNM 3.9 fp1 (.49) Unable to collect mpls interfaces information Specifically, it's the following fields from the SSH_MSG_CHANNEL_OPEN packet. uint32 initial window size and uint32 maximum packet size Implementations MUST correctly handle window sizes of up to 2^32 - 1 bytes. The window MUST NOT be increased above 2^32 - 1 bytes. We found that when we used 2^32-1 as the value for these fields, the router would not return a prompt. modifed our code to use 2^30-1
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * Users trying to discovery certain Cisco devices running * * IOS-XR * **************************************************************** * PROBLEM DESCRIPTION: * * The CiscoSwitchTelnet agent is unable to login to a device * * running IOS-XR * **************************************************************** * RECOMMENDATION: * * Apply a testfix or upgrade to 3.9FP2 * * | fix pack | 3.9.0-ITNMIP-FP0002 * ****************************************************************
Problem conclusion
The Cisco device does not correctly support the RFC values for window and max packet size The RFC defines that Implementations MUST correctly handle window sizes of up to 2^32 - 1 bytes. The window MUST NOT be increased above 2^32 - 1 bytes. And we were using 2^32 -1. Changing this to 2^31-1 allows ITNM to login to the devices
Temporary fix
Comments
APAR Information
APAR number
IV17407
Reported component name
TIV NETWK MGR I
Reported component ID
5724S4500
Reported release
390
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2012-03-16
Closed date
2012-04-11
Last modified date
2012-04-11
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
TIV NETWK MGR I
Fixed component ID
5724S4500
Applicable component levels
R390 PSY
UP
[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSSHRK","label":"Tivoli Network Manager IP Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"3.9","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
11 April 2012