Reference Guide

Table Of Contents
mode l3
After you configure the VLAN scale profile, enables L3 routing on a VLAN.
Syntax
mode l3
Parameters None
Defaults Not configured
Command Mode INTERFACE VLAN
Usage
Information
To configure the VLAN scale profile, use the scale-profile vlan command. The scale profile
globally applies L2 mode on all VLANs you create and disables L3 transmission. To enable L3 routing
traffic on a VLAN, use the mode L3 command.
Example
OS10(config)# interface vlan 10
OS10(conf-if-vl-10)# mode L3
Supported
Releases
10.4.0E(X2) or later
mtu
Sets the link maximum transmission unit (MTU) frame size for an Ethernet L2 or L3 interface.
Syntax
mtu value
Parameters value Enter the maximum frame size in bytes (1280 to 65535).
Default 1532 bytes
Command Mode INTERFACE
Usage
Information
To return to the default MTU value, use the no mtu command. If an IP packet includes a Layer 2 header,
the IP MTU must be at least 32 bytes smaller than the L2 MTU.
Port-channels
All members must have the same link MTU value and the same IP MTU value.
The port channel link MTU and IP MTU must be less than or equal to the link MTU and IP MTU
values configured on the channel members. For example, if the members have a link MTU of 2100
and an IP MTU 2000, the port channels MTU values cannot be higher than 2100 for link MTU or
2000 bytes for IP MTU.
VLANS
All members of a VLAN must have same IP MTU value.
Members can have different link MTU values. Tagged members must have a link MTU 4 bytes
higher than untagged members to account for the packet tag.
The VLAN link MTU and IP MTU must be less than or equal to the link MTU and IP MTU values
configured on the VLAN members. For example, the VLAN contains tagged members with a link
MTU of 1522 and IP MTU of 1500 and untagged members with link MTU of 1518 and IP MTU of
1500. The VLANs link MTU cannot be higher than 1518 bytes and its IP MTU cannot be higher
than 1500 bytes.
Example
OS10(conf-if-eth1/1/7)# mtu 3000
Supported
Releases
10.2.0E or later
port-group
Configures a group of front-panel unified ports or a double-density QSFP28 (QSFP28-DD) port.
Syntax
port-group node/slot/port-group
Interfaces 105