The "transmit-cap" value is configured in our data model per device-interface. If you don't configure it, or set the value of transmit-cap to "unlimited", it will use the speed of the interface by default.
In the example you cite with a 10Gbps interface capped at 50Mbps by your ISP, you'd need to configure the transmit-cap on that interface to 50Mbps. Otherwise the system will assume it can use all 10Gbps
Here's an example from a 128T I have running at a cabin out in the boondocks, where the best "broadband" I can get is sloooowwww DSL:
admin@labsystem1.fiedler# conf auth router becket node labsystem4
admin@labsystem1.fiedler (node[name=labsystem4])# device-interface wan
admin@labsystem1.fiedler (device-interface[name=wan])# show
name wan
description "WAN interface"
type ethernet
pci-address 0000:01:00.0
traffic-engineering
enabled true
transmit-cap 2000000
traffic-profile ADSL
exit
enabled true
capture-filter len>0
My 128T is physically plugged into a DSL modem using an ethernet cable... 100Mbps connection. But upstream from that modem, the connection is 2Mbps on a good day. So I've capped my interface to 2Mbps in configuration.
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pt.
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Original Message:
Sent: 11-27-2018 13:23
From: Patrick Melampy
Subject: What is the behavior of traffic engineering when transmit-cap unlimited?
MIke, could you clarify something please. The transmit cap defines the limit for the interface as determined by what? Physical link speed? Actual observed link speed? If I have a 10GigE interface plugged into an ISP that is providing a 50Meg Link, does unlimited mean 10GigE or 50Meg? How is the 50Meg determined? By configuration?
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Patrick Melampy
Chief Operating Officer
MA
(781) 203-8431
Original Message:
Sent: 11-02-2018 00:00
From: Michael Adams
Subject: What is the behavior of traffic engineering when transmit-cap unlimited?
Reid, you are correct. The 128T takes the minimum value between the configured transmit-cap and the negotiated link speed. In the case where transmit-cap is set to 'unlimited', the 128T will use the negotiated link speed as the cap.