Monitoring Ppp Sessions Using The Snmp Management Tools; Snmp Process And High Cpu Utilization - Cisco 10000-2P2-2DC Software Configuration Manual

Chapter 2 Scalability and Performance
Table 2-7
Command
snmp
source
stun
transmit-interface
trunk-group
tx-ring-limit
In Example
that the interface-specific command carrier-delay is set.
Example 2-10 Verifying Interface-Specific Commands in the Virtual Template
Router(config)# test virtual-template 11 subinterface
Subinterfaces cannot be created using Virtual-Template11
Interface specific commands:
carrier-delay 45

Monitoring PPP Sessions Using the SNMP Management Tools

To prevent the virtual-access subinterfaces from being registered with the SNMP functionality of the
router and using memory, do not use the router's SNMP management tools to monitor PPP sessions. Use
the no virtual-template snmp command to disable the SNMP management tools
Example 2-11 Preventing SNMP Registration of Virtual-Access Subinterfaces
Router(config)# no virtual-template snmp

SNMP Process and High CPU Utilization

Network management applications retrieve information from devices by using SNMP. If a user
application polls the SNMP MIBs while the router is updating its routing table, the SNMP engine
process can cause CPU HOG messages to appear and sessions and tunnels to go down until the process
releases the CPU.
For information about how to avoid high CPU utilization by an SNMP process, see the
IP Simple Network Management Protocol (SNMP) Causes High CPU Utilization Tech Note, located at
the following URL:
http://www.cisco.com/warp/public/477/SNMP/ipsnmphighcpu.shtml#polling
OL-2226-23
Interface-Specific Commands That Prevent PPP Scaling (continued)
Function
Modifies Simple Network Management Protocol
(SNMP) interface parameters.
Gets the configuration from another source.
Serial Tunnel (STUN) interface subcommands.
Assigns a transmit interface to a receive-only
interface.
Configures an interface to be in a trunk group.
Limits the number of particles or packets that can
be used on a transmission ring on an interface.
2-10, the output of the test virtual-template <number> subinterface command indicates
Configuring the Cisco 10000 Series Router for High Scalability
Cisco 10000 Series Router Software Configuration Guide
(Example 2-11).
2-13