Port and Interface Frequently Asked Questions
For frequently asked questions about all services and support, see the PacketFabric FAQ.
What does the “PF-XX” stand for in interface and circuit names? What does “CT” mean in IDs?
PF-AE: LAG interface and aggregated Dedicated cloud connections
PF-AP: Port and non-aggregated Dedicated cloud connections
PF-BC: Backbone virtual circuit
PF-DC: Marketplace/third-party virtual circuit
PF-IX: IX virtual circuit
PF-MC: A marketplace virtual circuit that connects to a cloud port
PF-CC: Hosted cloud connections and virtual circuits associated with Dedicated cloud connections
PF-PD: Point-to-point connection
PF-TC: Test virtual circuit (no longer used)
Colt-powered port IDs start with CT-. If a virtual circuit has CT in its circuit ID, then one side of it lands on a Colt-powered port. For more information, see Colt-Powered Ports.
Where can I find your Service Level Agreement (SLA)?
There is a link to the SLA in the PacketFabric website footer.
Cross Connects and LOAs
What is an LOA?
LOA stands for Letter of Authorization or Letter of Authority. They are also sometimes called LOA-CFAs (Connecting Facility Assignment).
The LOA is required to install a cross connect between your equipment and ours.
The LOA tells the data center three things:
1.) You have permission to connect your equipment with ours.
2.) The exact location of the port at which they should install the physical cross connect.
3.) The media they should use for the connection.
Click here to download a template.
For more information, see Cross Connects.
The data center cannot install my cross connect because the port is occupied. What does this mean?
We pre-cable the rear side of all our panels. Sometimes data center technicians will mistake this to mean that the port is already occupied. However, the front side of the panel should be open for new cross connects.
If they are still reporting that the port is occupied after checking the front panel, it is possible that the previous cross connect was never removed. To have us verify this for you, open a ticket by emailing firstname.lastname@example.org.
Do ports need to be physically connected after an order is placed?
Cross connects are a physical connection, so yes.
However, all PacketFabric equipment is pre-patched and pre-cabled and ready for connections. This means that we just need to complete any patching to your local side that is not already in place.
Why do some of my ports allow me to order a cross connect while others don’t?
The ability to order a cross connect through the PacketFabric portal depends on the data center. If you do not see the Cross Connect action in the port’s overflow menu, you will need to generate an LOA and contact the data center directly with your request.
For more information, see Cross Connects.
What does ‘powered by Colt’ mean?
When a port is “powered by Colt,” this means that it is owned and operated by Colt Technology Services but can be used as if it is a native part of the PacketFabric network.
For more information, see Colt-Powered Ports.
What is a “non-core location” and why is the SLA not applicable for it?
A non-core location is also known as a “single-armed” or “single-homed” site.
Our core locations are multi-armed/multi-homed. This means that there are multiple fiber pathways connecting to the POP device, and should something happen to one fiber pathway we can reroute your traffic with minimal disruption.
However, a non-core location is connected to a single fiber pathway. Think of it like a cul-de-sac: one way in, one way out. This means that if something should disrupt connections along that pathway, we cannot reroute your traffic to avoid disruption, thereby upholding the SLA.
Do you support jumbo frames?
Yes, we support jumbo frames.
All our interfaces support an MTU of 9096 at layer 2. However, there might be additional overhead for VLAN tagging used on EVPL circuits.
We recommend setting your MTU to 9000 bytes.
How many bytes should I set for my MTU?
This depends on the service.
- Access ports, point-to-point, backbone virtual circuits
- For optimal performance, set your MTU to 9000 bytes.
- Cloud connections
- Check the cloud service provider requirements:
AWS Direct Connect: When creating a Direct Connect virtual interface, you can optionally enable jumbo frames at either 8500 (Transit VIF) or 9001 (Private VIF) bytes. If you do not enable jumbo frames, or if you use static routes, the MTU is 1500 bytes. For more information, see Setting network MTU for private virtual interfaces or transit virtual interfaces.
Google Cloud Interconnect: Google allows a maximum of 1440 bytes.
Azure ExpressRoute: Azure allows a maximum of 1500 bytes.
IBM Direct Link: IBM allows a maximum of 1500 bytes.
Oracle FastConnect: Oracle allows a maximum of 9000 bytes.
Can I LAG multiple EPL services?
Not directly, but there is a workaround.
Our EPL service is transparent and our routers will not act on LACP packets. We only pass them to the other side of the circuit.
However, because the LACP packets are passed to the other side, it is still possible to exchange LACP packets between the both sides of the service.
This means that LAG participation will be between your network devices on each end of the service and not between your network device and our network device.
Why can’t I add this port to a LAG?
To be included in a LAG, the ports must be at the same site, in the same zone, and have the same speed.
If you have verified it matches that criteria and you are still unable to include it in a LAG, then the port likely does not support LAGs. Not all edge ports support LAGs at this time.
How many ports can I add to a LAG?