.NODE

Setting SNMP Packet Size

Problem

You want to change the default SNMP packet size.

Solution

The following configuration command adjusts the default packet size for all SNMP packets leaving the router:

Router#configure terminal 
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#snmp-server packetsize 1480
Router(config)#end
Router#

 

Discussion

By default, Cisco routers limit their SNMP packet size to 1,500 bytes. It is usually not necessary to change this parameter. However, it may be useful to reduce it if your network has an MTU of less than 1,500 bytes to prevent unnecessary fragmentation.

Conversely, if your network media can accepts a larger MTU than 1,500 bytes, then increasing your SNMP packet size can improve performance, particularly when transferring large MIB tables.

Note that adjusting the maximum SNMP packet size will affect all types of SNMP packets, including responses to SNMP get or set requests, as well as SNMP traps and SNMP informs. You can set the SNMP packet size to any integer between 484 and 8,192 bytes.

Router Configuration and File Management

Router Management

User Access and Privilege Levels

TACACS+

IP Routing

RIP

EIGRP

OSPF

BGP

Frame Relay

Handling Queuing and Congestion

Tunnels and VPNs

Dial Backup

NTP and Time

DLSw

Router Interfaces and Media

Simple Network Management Protocol

Logging

Access-Lists

DHCP

NAT

First Hop Redundancy Protocols

IP Multicast

IP Mobility

IPv6

MPLS

Security

Appendix 1. External Software Packages

Appendix 2. IP Precedence, TOS, and DSCP Classifications

Index

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Cisco IOS Cookbook
Cisco IOS Cookbook (Cookbooks (OReilly))
ISBN: 0596527225
EAN: 2147483647
Year: 2004
Pages: 505
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