Cisco ASR 1000 Series Configuration Guide

PurposeCommand or Action
(Optional) Enables Path MTU Discovery.
ip tcp path-mtu-discovery [age-timer {minutes
| infinite}]
Step 4
• age-timer —Time interval, in minutes, TCP reestimates the
Maximum Transmission Unit (MTU) with a larger Maximum
Example:
Device(config)# ip tcp path-mtu-discovery
age-timer 11
Segment Size (MSS). The default is 10 minutes. The
maximum is 30 minutes.
• infinite—Disables the age timer.
(Optional) Enables TCP selective acknowledgment.ip tcp selective-ack
Example:
Device(config)# ip tcp selective-ack
Step 5
(Optional) Enables the TCP time stamp.ip tcp timestamp
Example:
Device(config)# ip tcp timestamp
Step 6
(Optional) Sets the TCP maximum read size for Telnet or rlogin.
ip tcp chunk-size characters
Step 7
Example:
Device(config)# ip tcp chunk-size 64000
We do not recommend that you change this
value.
Note
(Optional) Sets the TCP window size.
ip tcp window-size bytes
Step 8
Example:
Device(config)# ip tcp window-size 75000
•
The bytes argument can be set to an integer from 68 to
1073741823. To enable window scaling to support Long Flat
Networks (LFNs), the TCP window size must be more than
65535. The default window size is 4128 if window scaling
is not configured.
With CSCsw45317, the bytes argument can be set to an
integer from 68 to 1073741823.
Note
(Optional) Enables ECN for TCP.ip tcp ecn
Example:
Device(config)# ip tcp ecn
Step 9
(Optional) Sets the TCP outgoing queue size.
ip tcp queuemax packets
Example:
Device(config)# ip tcp queuemax 10
Step 10
Exits to privileged EXEC mode.end
Example:
Device(config)# end
Step 11
IP Application Services Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 1000)
31
Configuring TCP
Configuring TCP Performance Parameters

Cisco ASR 1000 Series Specifications

General

Brand	Cisco
Model	ASR 1000 Series
Category	Network Router
Language	English