Command Reference Guide

IPv4 Routing | 669
Example: The VLAN contains tagged members with Link MTU of 1522 and IP MTU of 1500
and untagged members with Link MTU of 1518 and IP MTU of 1500. The VLAN’s Link
MTU cannot be higher than 1518 bytes and its IP MTU cannot be higher than 1500 bytes.
Related
Commands
ip name-server
c e s
Enter up to 6 IPv4 addresses of name servers. The order you enter the addresses determines
the order of their use.
Syntax
ip name-server ipv4-address [ipv4-address2...ipv4-address6]
To remove a name server, use the
no ip name-server ip-address command.
Parameters
Defaults
No name servers are configured.
Command Modes
CONFIGURATION
Command
History
Table 23-2. Difference between Link MTU and IP MTU
Layer 2 Overhead Difference between Link MTU and IP MTU
Ethernet (untagged) 18 bytes
VLAN Tag 22 bytes
Untagged Packet with VLAN-Stack Header 22 bytes
Tagged Packet with VLAN-Stack Header 26 bytes
mtu Set the link MTU for an Ethernet interface.
ipv4-address
Enter the IPv4 address, in dotted decimal format, of the name server to be used.
ipv4-address2...
ipv4-address6
(OPTIONAL) Enter up five more IPv4 addresses, in dotted decimal format, of
name servers to be used.
Separate the addresses with a space.
Version 8.3.7.0 Introduced on S4810
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.6.1.0 Added support for S-Series
Version 7.5.1.0 Added support for C-Series
pre-Version 6.1.1.0 Introduced for E-Series