The ports are working as they should. The only problem is a computer in a building connected on port 1 can't print to a printer in a building connected to port 2. I believe, but the Virtual Path Identifier VPI needs to be setup with a number other than 0, and it has to be the same on all the cards in order for the data to travel between them I might have that backwards To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks.
Thanks in advance! Popular Topics in General Networking. Spiceworks Help Desk. The help desk software for IT. Track users' IT needs, easily, and with only the features you need. Learn More ». Jason This person is a verified professional. Verify your account to enable IT peers to see that you are a professional. Bear with me it's been a long time since the Telco days.
Many service providers opt to build their networks using Ethernet for their backhaul uplinks. Ethernet, such as Metro Ethernet, can be used for both carrier backbone and access network segments.
Unlike ATM cell relay, frame relay is a packet switching technology that transmits different sized frames. A frame carries more addressing and error handling identifier tags than ATM packets. However, the frame relay protocol can also be configured to use PVC to forward packets to their destination using permanent pathways as ATM cells do to achieve faster speeds. Carrier Ethernet, such as Metro Ethernet, can be used for backbone and access network segments. Ethernet standards are constantly being expanded and improved.
In fact, the Ethernet Alliance has recently announced new standards for the backhaul of networks:. Be sure to visit the Ethernet Alliance website to learn more about these new standards.
With constantly evolving Ethernet standards, Ethernet has become an integral component that maintains IP-Based networks cost-effective. The main differentiating features are subscriber capacity, throughput, packet loss, latency and jitter.
DSLAMs provide a range of subscriber capacity. There are three main metrics that dictate subscriber capacity: line density, subscriber and session capacity. Throughput measurements overview a variety of network environment factors that may influence the overall sustainable throughput of a unit including packet sizes, session volumes, and other network environment features such as IGMP snooping, QoS, AAA, and other related features depending on the capabilities of a DSLAM.
Throughput allows carriers to differentiate their service packages from their competitors and is one of the most important factors that carriers take into consideration when deciding which DSLAM to purchase. For example, a subscriber that is closer to a central office server of their ISP, will be able to experience faster rates using VDSL2 than a subscriber that lives farther away using the same equipment and xDSL technology.
Robust QoS features further improves the accuracy of throughput in real-world settings. These more complex types of traffic are more sensitive to delays or latency and requires more advanced traffic management features to reduce packet loss, latency and jitter.
ISPs and network installers can also set the prioritization of voice, video and data traffic to optimize performance. Since voice is more sensitive to delays, incoming and outgoing voice traffic can take priority over data traffic. As mentioned before, network installers will need to assess the amount of subscribers they are seeking to serve and the distance ranges they are seeking to cover.
DSLAM units come in a variety of sizes with different subscriber capacities. There are a myriad of DSLAM options built for large-scale deployments that can support several thousand subscribers.
As broadband data has grown more complex, DSLAMs have had to account for value-added triple play services placing greater importance on traffic management features. These units support varying subscriber capacity and DSL service types.
As a network grows in size, additional units from different vendors can be added to a network. Devices such as the VXHDx provide longer distances and are designed for access networks. These units are heftier in size measuring around 1. Knowing the approximate location of your nearest DSLAM will help you more accurately gauge the expected speed of your Internet service. They should be able to give you approximate speeds based on your location.
Users will need to configure virtual local area networks VLANs , QoS, and reserve a set amount of bandwidth for voice—the traffic type most sensitive to latency—on their switches. Great job to the doc author! Very brief yet very informative and useful. Thank you for the information. Great article! I love how you explained these technical terms in a straightforward manner and even made it easier to understand with a help of an infographic. Technical terms might be hard to understand and might seem like a nosebleed for some people but it really just takes some reading to fully understand how these parts work.
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