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2-13
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 2 Scalability and Performance
Configuring the Cisco 10000 Series Router for High Scalability
In Example 2-10, the output of the test virtual-template <number> subinterface command indicates
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).
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
snmp Modifies Simple Network Management Protocol
(SNMP) interface parameters.
source Gets the configuration from another source.
stun Serial Tunnel (STUN) interface subcommands.
transmit-interface Assigns a transmit interface to a receive-only
interface.
trunk-group Configures an interface to be in a trunk group.
tx-ring-limit Limits the number of particles or packets that can
be used on a transmission ring on an interface.
Table 2-7 Interface-Specific Commands That Prevent PPP Scaling (continued)
Command Function