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Questions tagged [service-provider]

For questions about or involving a network service provider. For instance, you are setting up a router for a new service provider and need help configuring the interface connecting to them.

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12
votes
1answer
3k views

Point Of Presence vs. Central Office

What is the difference between these two (in distance and function)? I understand that a Central Office is a place where the ISP stores equipment that connects many clients. But the POP has a similar ...
9
votes
2answers
4k views

How can hosts with public IP addresses have nodes with private IP addresses in their traceroute?

I'm doing some research on users connected to Internet via cable operators and I've seen some unusual route traces. A bit about setup: Basically user has a home router connected to a DOCSIS modem. ...
7
votes
3answers
1k views

Alternatives to multiple Service Providers

I have one SP right now that serves 100 Sites and we are currently planning to migrate all the sites to a new SP. However, this will be a phased migration, so we will have some sites in the new SP ...
5
votes
1answer
2k views

Network Design Improvement Advice

We are thinking about redesigning our network. The topology is a star and is comprised of several similar POPs. The entire network is based on Cisco devices. The core router is a Cisco 7600 and two ...
4
votes
2answers
839 views

Internet structure and ISP networks in detail

I am studying about internet structure, ISPs and their interconnection. However, I have trouble connecting some terms and understanding the greater infrastructure of internet in more detail. I will ...
4
votes
1answer
558 views

Why doesn't ISPs reset DSCP at the edge before delivering traffic to customers?

Some ISPs are doing QoS based on traffic type (online streaming), such as Comcast and Cogent. Why don't they reset IP DSCP at the edge so it is not as obvious that they are doing some kind of traffic ...
3
votes
2answers
5k views

What is an Edge Points of Presence (POPs)

I was browsing through the web about WAN technologies, and came across Google Peering, It seems they have rolled out their backbone across the globe, and have multiple peering locations globally. I ...
3
votes
1answer
268 views

Differences between Enterprise internet connections with the same nominal bandwidth

First of all, I am new to the forum and am unsure whether this is the right place to post my question. If this is not the right place, I would appreciate you letting me know the best website to ask ...
3
votes
1answer
137 views

Service Provider inbound routing problems before using communities

As I understand it Service Providers used to use BGPs local preference for manipulating outbound traffic and AS Path for manipulating inbound traffic before they used communities. As the internet grew,...
2
votes
2answers
151 views

How do service providers segregate customers?

Looking to get some insight from guys in the service provider space. The question is straightforward: If you're in a provider environment, and lets say you have 10,000 customers, each with their own ...
1
vote
1answer
292 views

WAN lines types - understanding leased line/circuit

Studying the WAN lines types, am I right regarding the statements below, or if not, could you correct me please: A real leased line, could be performed with TDM on a line with for example SDH, TDH or ...
1
vote
2answers
286 views

Fiber Type and transceiver model required

We have an existing 10 G p2p link between our Datacenter ( DC) and Corporate Office ( HQ )with a service provider, Lets call A When A did our install they have used a Cienna box on HQ side , I ...
1
vote
1answer
37 views

Assign a new public and static IP to a router behind my main router [closed]

What can you suggest to bring a second public and static IPv4 so I can configure my WAN-A interfase with my primary and an additional secondary IP settings so I can route all the traffic from the ...
1
vote
1answer
161 views

How to use dynamic NAT to allow access from customer RFC1918 subnets for access to Internet and LAN?

I am currently working on a project for a SP and one of their requests has me stumped. Background : The customer wants to move to a vendor's WAN solution and for the underlay , we are using DMVPN. ...
1
vote
1answer
1k views

Frame tag decision based on switch port TPID (EtherType)

I'm working on developing the ingress logic of a software switch and have a doubt. So here's my understanding. When a frame ingresses a switch, its 13th and 14th byte are checked against standard 802....
1
vote
1answer
54 views

VoIP Provider and Phone Number Routing Questions

I am fairly familiar with VoIP and I have my own VoIP PBX, and my provider is Twilio (for Voice) and CallCentric (for Fax). But How do providers like Twilio work exactly? More specifically: How do ...
1
vote
1answer
671 views

MPLS load balancing on Huawei S5700

On a L3 switch there are two equal cost ISIS routes. Destination/Mask Proto Pre Cost Flags NextHop Interface 10.150.4.12/32 ISIS-L2 15 10 D 10.200.15.42 Vlanif27 ...
1
vote
0answers
63 views

SIP message, Via, Call-ID and Contact headers [closed]

In a SIP message, how is the "Via" header set? If the value that appears in that header doesn't look correct, how can it be altered using Cisco command(s)? Same questions for the "Call-ID" header, ...
0
votes
2answers
329 views

Physical interface as switch port and VLAN interface as layer 3 [closed]

In most of large ISP networks, physical interfaces are used as switch ports (layer 2 port) and VLAN interfaces are used as layer 3. Could you please explain what is the main purpose to use like this?