Cisco ASR 1000 Series Software Configuration Guide

PurposeCommand
Configures the maximum packet size for an interface,
where:
•
bytes— Specifies the maximum number of bytes
for a packet.
The default is 1500 bytes and the maximum
configurable MTU is 9216 bytes.
Router(config-if)# mtu bytes
To return to the default MTU size, use the no form of the command.
Verifying the MTU Size
To verify the MTU size for an interface, use the show interfaces gigabitethernet privileged EXEC command
and observe the value shown in the “MTU” field.
The following example shows an MTU size of 1500 bytes for interface port 1 (the second port) on the Gigabit
Ethernet SPA installed in the top subslot (0) of the SIP that is located in slot 2 of the Cisco ASR 1000 Series
Routers:
Router# show interfaces gigabitethernet 2/0/1
GigabitEthernet2/0/1 is up, line protocol is up
Hardware is SPA-1X10GE-L-V2, address is 000a.f330.2e40 (bia 000a.f330.2e40)
Internet address is 2.2.2.1/24
MTU 1500 bytes
, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not supported
QoS Classification
The physical level interface module (PLIM) is the hardware component in the data path between the media
interface and the forwarding engine.
Use the following commands in interface configuration mode to configure QoS:
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Everest 16.5
OL-14127-17 123
Configuring the Ethernet SPAs
QoS Classification

Cisco ASR 1000 Series Specifications

General

Brand	Cisco
Model	ASR 1000 Series
Category	Network Router
Language	English