General Port Commands
Page 148 7210 SAS M, T, X, R6, R12, Mxp Interface Configuration
Guide
mtu
Syntax mtu mtu-bytes
no mtu
Context config>port>ethernet
Description This command configures the maximum payload MTU size for an Ethernet port port. The Ethernet port
level MTU parameter indirectly defines the largest physical packet the port can transmit or the far-end
Ethernet port can receive. Packets received larger than the MTU will be discarded. Packets that cannot be
fragmented at egress and exceed the MTU are discarded.
The value specified for the MTU includes the destination MAC address, source MAC address, the Ethertype
or Length field and the complete Ethernet payload. The MTU value does not include the preamble, start of
frame delimiter or the trailing CRC.
The no form of this command restores the default values.
Default The default MTU value depends on the (sub-)port type, mode and encapsulation and are listed in the
following table:
Parameters mtu-bytes — Sets the maximum allowable size of the MTU, expressed as an integer.
Values 512 — 9212
Range
config>port>ethernet 512 — 9212
multicast-ingress
Syntax multicast-ingress {l2-mc | ip-mc}
no multicast-ingress
Context config>port>ethernet
Description Platforms Supported: 7210 SAS-M, 7210 SAS-X, 7210 SAS-R6, 7210 SAS-R12, 7210 SAS-T.
On 7210, ingress of a port either IGMP snooping L2 multicast lookup can be enabled or IP multicast L3
multicast lookup can be enabled. This command allows user an option to turn on either IP multicast or
IGMP snooping on a given port. These are mutually exclusive.
Type Mode Encap Type Default
(Bytes)
10/100, Gig, or 10GigE Access null 1514
10/100, Gig, or 10GigE Access dot1q 1518
10/100, Gig, or 10GigE Access q-in-q 1522
10/100 or 100FX Ethernet Network null 1514
10/100 or 100FX Ethernet Network dot1q 1518
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