Cisco Cisco ASR 5000
SGSN Global Configuration Mode Commands
▀ max-pending-attaches
▄ Command Line Interface Reference, StarOS Release 18
8564
max-pending-attaches
Configure the maximum length of the pending attach queue.
Product
SGSN
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration > SGSN Global Configuration
configure > sgsn-global
Entering the above command sequence results in the following prompt:
[local]host_name(config-sgsn-global)#
Syntax
max-pending-attaches limit
default max-pending-attaches
default
Resets the SGSN’s Attach queue to a maximum pending value of 10,000.
limit
Set the a maximum limit to the pending Attach/RAU messages queue in the LinkMgr. When the limit is
reached a message is sent to the IMSIMgr.
reached a message is sent to the IMSIMgr.
limit
: Enter an integer from 5000 - 50000. Default is 10000.
Usage
With this command, configure the maximum limit to the pending ATTACH/RAU messages queue in the
LinkMgr. When the limit is reached, the LinkMgr sends the Query/Forward messages to the IMSIMgr.
As the IMSIMgr gets busier and does not responded to Query/Forward requests, the response to the requests
will get slower and slower and the queue size continues inflating if the incoming message rate is high. To
avoid this situation, set the
LinkMgr. When the limit is reached, the LinkMgr sends the Query/Forward messages to the IMSIMgr.
As the IMSIMgr gets busier and does not responded to Query/Forward requests, the response to the requests
will get slower and slower and the queue size continues inflating if the incoming message rate is high. To
avoid this situation, set the
max-pending-attaches
for the pending queue for Attach and RAU messages.
All other messages from the HLR will be added to the queue as they cannot be dropped. High and low
watermarks are set to the queue at 80% of
watermarks are set to the queue at 80% of
max-pending-attaches
” and 60% of
max-pending-
attaches
respectively.
Once a high watermark is reached, the new Attach and RAU requests are dropped and relevant statistics are
incremented. Once a low watermark is hit, the new Attach/RAU requests are accepted and added to the
pending queue. The entries are added to the pending queue only when the window-size between IMSIMgr
and LinkMgr becomes zero. This is a very rare occurrence and will not affect the current behavior in normal
circumstances.
incremented. Once a low watermark is hit, the new Attach/RAU requests are accepted and added to the
pending queue. The entries are added to the pending queue only when the window-size between IMSIMgr
and LinkMgr becomes zero. This is a very rare occurrence and will not affect the current behavior in normal
circumstances.
Example
Set the queue length to a maximum of
15000
requests:
max-pending-attaches 15000