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Only if you ISP does QinQ will you be able to extend your vlan(s) across their network. They will need to encapsulate your vlan tags with one of their vlans.
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Only if you ISP does QinQ will you be able to extend your vlan(s) across their network. They will need to encapsulate your vlan tags with one of their vlans.

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I am not sure what you want to accomplish, a diagram might be useful. 
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I am not sure what you want to accomplish, a diagram might be useful.

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We have a layer 2 connection to one of our remote offices. At our remote office we have a sonicwall appliance, it is a NSA 2400. I want to extend one of our vlan's. We have an ethernet connection from our ISP's switch running directly into our sonicwall appliance. I am wondering if anyone can tell me if it's possible to extend the vlan through the sonicwall appliance and if so, how would I do that? Will I have to install another switch and place it between our ISP's switch and the sonicwall in order to accomplish this? Make an ethernet connection from the newly installed switch directly into a part on our procurve and tag the vlan that way? It would be really cool if I could accomplish this without having to add another switch. Feedback is appreciated!
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We have a layer 2 connection to one of our remote offices. At our remote office we have a sonicwall appliance, it is a NSA 2400. I want to extend one of our vlan's. We have an ethernet connection from our ISP's switch running directly into our sonicwall appliance. I am wondering if anyone can tell me if it's possible to extend the vlan through the sonicwall appliance and if so, how would I do that? Will I have to install another switch and place it between our ISP's switch and the sonicwall in order to accomplish this? Make an ethernet connection from the newly installed switch directly into a part on our procurve and tag the vlan that way? It would be really cool if I could accomplish this without having to add another switch. Feedback is appreciated!

Extending a VLAN to Remote Office (NLAN)

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

Network design and methodology, also known as network architecture, is the design of a communication network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as data formats used in its operation. In telecommunication, the specification of a network architecture may also include a detailed description of products and services delivered via a communications network, as well as detailed rate and billing structures under which services are compensated.