Questions tagged [isp]

Questions relating to the operations of ISPs and interacting with them.

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upload speed is very slow only on PC [closed]

I have two devices, a PC and a Macbook pro I connect to the internet through LAN with my PC and I connect to the internet through wifi with my laptop if I test the upload speed through my laptop, the ...
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12 views

Why do default ISP routers perform poorly? [closed]

So I used to be a dev but we never had much knowledge on "50% of hardware": the network. I come to you to ask a daily question, and learn about networks using it. Unholistic answers in the ...
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2answers
127 views

connecting two ISPs to my network

Hi My network has the following resources: 3 ASA-5505 w/site-to-site VPN's newly acquired c801F-K9 router Exchange Server 3 ISP's (soon to be 2) A t-1, DSL, Satellite. VOIP Cisco Cme My goal is to ...
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205 views

Active\Passive Routers w\ BGP

What I'm trying to do is take two routers, "A" and "B" where 'A' is the primary router. Just like with active\passive firewalls and HSRP I want to "float" the default gateway between either Router A ...
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3answers
2k views

What is the proper switch configuration for the switch that is connected directly to ISP source?

The Question: What is the proper configuration for the L3 switch to be allowed to assign public IPs for the firewalls? I guess All I need is that the switch L3 act as a layer 2 switch...Right? ...
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468 views

In one organization having two ISP which configured on fortigate firewall ? How can we do the failover for internet?

Organisation don't have AS number .As of now we are doing manually route for any ISP at a time. when default Internet link is go down that time making second link enable on firewall. I saw the some ...
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2answers
67 views

Where are ATM switches located in real life?

Consider the following diagram from this link: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/bbdsl/configuration/xe-3s/bba-xe-3s-book/bba-ppoe-atm-xe.html If I am correct, here's how I see it ...
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3answers
69 views

Who owns the in-between routers displayed when I execute a traceroute command?

When i traceroute a website, i get the IPs of all the routers in the path between me and the website. Who owns all those routers? Are they organized in a particular kind of building?
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1answer
27 views

Why is OSPF more popular than IS-IS in enterprise networks? [closed]

I've read that IS-IS is more popular than OSPF in Internet Service Providers due to historical reasons (mainly that initially IS-IS had better hardware support and wasn't for IP only). But why did ...
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1answer
35 views

How is traceroute able to display hostnames?

When performing a traceroute, what function on the ISP gateway is advertising the hostname? When we traceroute to Google.com for instance; Tracing route to google.com [216.58.213.14] over a maximum of ...
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1answer
21 views

How are Upstream Frequencies assigned for Cable Modems? [closed]

For the past week I've had serious internet issues where people couldn't use my services because of packet loss and upload speeds plummeting to kbit/s resolution (0.09 mbit/s). I noted that one of my ...
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299 views

Can you keep DHCP addresses from your ISP

I have my modem configured for bridge mode. I get one IPv4 for my router and one goes to my server for public access. If I static assigned these IPv4 address would I keep them as long as no one else ...
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32 views

Ping responses to the Gateway

Last week, I have experienced a strange scenario with Adtran NV3448(a router) and an ISP circuit. Adtran is a similar company like Cisco, also makes networking equipment such as Router, switches, etc. ...
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4answers
466 views

Advertise downstream customer-owned /24 without BGP-Peering

First post, so I apologize if I don't lay things out clearly, or if this is the wrong forum. We are a small/regional ISP. We have a customer who has a couple of /24s (not purchased through us), and ...
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96 views

What is the relationship between an ISP and an AS?

Can one AS unite several ISPs, can/does an ISP own several ASes? No matter what I read nobody really clarifies this relationship or at least doesn't writes it down. Or is ISP and AS just a synonym? Is ...
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276 views

How ISP identifies a device on an LTE network?

I have an LTE CPE which has been provided by an ISP. When I tried to put the SIM into another device, it connected to the network but instantly got disconnected from the network. There should be some ...
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40 views

CMTS (DOCSIS 3.0) with CGN (CGNat)

For a new project/building I am working with the CMTS model MA5633-XB10 by Huawei. The usual way is done by implementing two DHCP servers in the same VLAN, from which the CPE gets the private IP ...
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207 views

Can you become your own ISP?

How exactly does an ISP connect you to the vast network of computers which is the internet? In my area there are several ISP's. For example. Bell, Rogers, and Cogeco all connect you to the "same ...
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3answers
225 views

Single-homed connection to ISP without NAT feature

Is it possible to connect my private network to the ISP router without a Network Address Translator (NAT) feature enabled on my router? As I understand, in a single-homed scenario connection to ISP, ...
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2answers
33 views

After routers within an AS have their routing tables sorted, how router A make sure the packets from it take the most efficient route to router Z?

Question in the title. I know a bit about IGP. My understanding is that these protocols only ensure every router in an AS knows about other routers within the AS. So, the scenario, correct me if I'm ...
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971 views

How can a server from US connect to a tier 1 ISP?

According to this graph : here is a full size version The facebook AS32934 server in the US is direcly connected to DE-CIX in germany. How can that be possible ? Is there fibers over the ocean ?
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34 views

How does ISP know which port to open for incoming answer from a site requesting, since sites answer in different ports from ones we ask? [closed]

I'm wondering how does ISP open door for incoming answer from a requesting site since the answer doesn't come from the requesting door, and how to achieve my computer IP since it's behind ISP firewall,...
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2answers
105 views

Modems involved in dial-up connection

I am currently studying the textbook Computer Networking -- A Top-Down Approach (7th Edition) by Kurose and Ross. In a chapter on Home Access: DSL, Cable, FTTH, Dial-Up, and Satellite, the authors ...
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63 views

WiMax technology

Does WiMax technology is used by an ISP for providing cellular internet services? Are WiMax technology different from cellular technology for providing internet? Please mention the difference if ...
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2answers
2k views

How does cellular data differ from an ISP, and what can be tracked?

Are IP addresses given to a phone static or not? Also, how can phone companies keep track of a person if they wanted to find them? For example, I don't have an account and use a pre-paid card. I'm ...
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1answer
96 views

ASA ISP limit of ISP Speed

I've got configured ASA with two ISP. First is main ISP and second for backup. Is possible to set on conf of ASA if the speed of main ISP will be at low bandwith, ASA will active a backup ISP?
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3answers
9k views

Can I set two gateways or more on the same subnet with NAT on a Cisco router?

Let's say I have the the following configuration on a Cisco router. ISP 1 Connected and configured into GigabitEthernet8. VLAN 1 192.168.0.0/24, NAT configured. Gateway is 192.168.0.1. ISP 2 ...
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1answer
358 views

Reasons for buying ASN for organisation that are located at single place

I see here that even some organisation/universities have bought ASN which are located at single location. What benefit they will get by buying ASN ? Is it compulsory to buy ASN if I have to buy some ...
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1answer
45 views

What technique is my ISP using to censor web traffic? [closed]

BBC news is censored in the country where I live. Out of interest I decided to briefly look at how this is done. First of all they apparently MITM DNS - if I look up BBC domains on Google's 8.8.8.8 I ...
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1answer
200 views

What does NAT64 do which can't be done by deploying IPv6 + NAT444?

Why was NAT64 developed? What does it do that can't be done by deploying IPv6 + NAT444, and allocating your customers a (public) IPv6 and a (private) IPv4 address (behind a shared public IPv4 address)?...
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2answers
531 views

How to know if ISP network have multiple routes

When it is time to choose an ISP in a remote area, I hope that the chosen ISP is having an acceptable redundancy in his network. Is there any way to verify all different route an ISP is having in his ...
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1answer
58 views

Map of WAN cables in general [closed]

Whenever i search for the physical location and path of WAN connectivity, i only find submarine cables, and a site that seems like a paid service. Is there no free map where i can e.g. show the route ...
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1answer
126 views

Public and Private IPs

I wondered if someone could explain this to me. At work we have a firewall that connects to the Internet and has an external IP configured on it via DHCP. The firewall's WAN port connects to an ...
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2k views

Can ISP know computer MAC address in local network?

There is a wifi network with 5 computers. When one of these computers request a URL from internet, Can ISP know the MAC Address of the computer that made request or phone's IMEI number? Are these ...
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1answer
1k views

How do i find out if a LAN is behind a multi-level NAT? [closed]

Not much i can specify here - its obvious that my CPE is NATing my LAN, but how do i find out if my ISP is using a carrier-grade NAT (obviously, without asking them)? I heard that port forwarding is ...
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4answers
693 views

Can I make 2 ISP providers' IP addresses into 1 IP address?

We have 2 ISP providers (X, Y) and we have connected the ISPs to a core switch>Sophos firewall>Switch rack>end user (LAN & WiFi). This ISP works on fail-over mechanism. The issue here is that we ...
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1answer
2k views

FortiGate 100A with VLAN on WAN port

I am trying to set up my old FortiGate 100A as a simple router for a small office network. My ISP's incoming PPPoE connection runs on VLAN 100 and I can't seem to get it going on a WAN port of the ...
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2answers
1k views

How do routers on the backbone avoid IP address conflicts?

As the title suggests, how do ISPs, and other networks connected to the backbone ensure that their host network address isn't already in use by another backbone node, as there is no controlling device ...
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1answer
122 views

Which part of an IPv6 address is assigned by the RIR?

Given my PC or any other, which part of the IPv6 address is allocated by the RIR and which part is allocated by the ISP? I know a prefix of /64 is commonly used, does that mean the bits before the /...
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2answers
2k views

Is my dynamic IP address provided by my ISP shared?

The IP address provided by my ISP changes. I want to know if it is shared by someone else in this world.
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2answers
2k views

block route being advertised to SP

I have a network that resembles this CUSTOMER - BT - SPRINT BT - CISCO customer loopback 192.168.10.1 customer loopback1 192.168.1.1 BT loopback 192.168.50.1 CISCO loopback 192.168.100....
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2answers
1k views

BGP RTBH setup with ISP

I had a discussion a while ago, related how to stop DDoS. Read this first: BGP null route when DDoS? Finally, we talked to the ISP, and it agreed on setting up a BGP trigger so the next time a DDoS ...
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2answers
184 views

can we do bgp route in cisco 2821 router?

I have a cisco2821 router and it has connected to one Internet service provider. Now i need to buy another one router so that i can have another Internet provider which can help me when one primary ...
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2answers
624 views

How do I route a public /24 subnet?

I have from my isp a static ip X.X.X.X and an unrouted public subnet Y.Y.Y.0/24 registred at ripe. An ex-coworker of mine setup a server that does the routing which have te folowing config: ISP----...
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1answer
141 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,...
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112 views

Can large ISPs really offer 1Gb “dedicated” service to every home and business?

Hopefully this is on topic for this site. While researching synchronous carrier service, so called EDIA or Ethernet Dedicated Internet Access, to a rural location in New Hampshire, USA, I came across ...
3
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1answer
202 views

WISP Network Edge Device - Router vs Switch

I am faced with an issue right now working for a small rural WISP. We have roughly 250 wireless customers throughout our area using Ubiquiti radios. Our main fiber drop comes in from a larger ISP on ...
2
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1answer
248 views

Rate limit based on VLAN

My ISP company has some PoPs in remote areas, as shown in diagram. It is currently, it's getting all prefixes from Local IX and getting only a default route from the upstream Internet provider. ...
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3answers
11k views

What causes packet loss when using full bandwidth from ISP?

We have a small, local ISP that is having some networking issues and I'm trying to understand the cause to better communicate with their network guys. I work with a number of companies with different ...
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2answers
956 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 ...