Table 160 Service-Mtu Command; Table 161 Mtu Values For Specific Vc Types; Service-Mtu - Nokia 7302 Manual

Virtual Private LAN Service
5.16.2.36
Table 160
Table 161
272

service-mtu

service-mtu command
Item Description
Syntax service-mtu octets
no service-mtu
Context configure>service>vpls
Description This command configures the service payload (Maximum Transmission Unit – MTU), in bytes,
for the service. This MTU value overrides the service-type default MTU. The service-mtu
defines the payload capabilities of the service. It is used by the system to validate the SAP and
SDP binding's operational state within the service.
Note: This parameter is not applicable for v-VPLS or m-VPLS. It is applicable for a normal
VPLS.
The service MTU and an SAP's service delineation encapsulation overhead (i.e., 4 bytes for a
dot1q tag) is used to derive the required MTU of the physical port on which the SAP was
created. If the required payload is larger than the port MTU, then the SAP will be placed in an
inoperative state. If the required MTU is equal to or less than the port MTU, the SAP will be
able to transition to the operative state.
When binding an SDP to a service, the service MTU is compared to the path MTU associated
with the SDP. The path MTU can be administratively defined in the context of the SDP. The
default or administrative path MTU can be dynamically reduced due to the MTU capabilities
discovered by the tunneling mechanism of the SDP or the egress interface MTU capabilities
based on the next hop in the tunnel path. If the service MTU is larger than the path MTU, the
SDP binding for the service will be placed in an inoperative state. If the service MTU is equal
to or less than the path MTU, then the SDP binding will be placed in an operational state.
In the event that a service MTU, port MTU, or path MTU is dynamically or administratively
modified, then all associated SAP and SDP binding operational states are automatically
re-evaluated.
The no form of this command returns the default service-mtu for the indicated service type to
the default value.
Default VPLS: 1514
Parameters octets — The size of the MTU in octets, expressed as a decimal integer.
Values 1 - 9208
Table 161
MTU Values for specific VC types
VC type
Ethernet
Ethernet (with preserved dot1q)
3HH-11985-AAAA-TQZZA
FD 100/320Gbps NT and FX NT IHub Services Guide
displays MTU values for specific VC types.
Example Service MTU
1514
1518
Advertised
MTU
1500
1504
Issue: 13