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Questions tagged [isp]

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

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Designing a web-facing network for redundancy and QoS (in a small business)

Summary How does one configure the web-facing part of a small business network for redundancy and quality of service? I mean ... we can have the control over our internal infrastructure, but what ...
iDontKnow's user avatar
1 vote
1 answer
37 views

ISP Multi-homing in Datacenter

My company is in the process of getting another ISP connection in one of the data centers we co-locate in. Should our main internet circuit fail, we want to failover to this new ISP that has a diverse ...
DragonFist616's user avatar
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2 answers
37 views

ASA - Redundancy ISP in Multiple contexts

At the moment I am interested in the fault tolerance of the route to providers in Cisco ASA in multiple contexts. As I know, in one context you cannot track the route and change it, but the task is to ...
Глеб Щеголев's user avatar
0 votes
1 answer
80 views

How is DHCP6 suppose to work with dynamic prefixes?

Let's consider a simple tree topology. There is an ISP router, there is my router / DHCP6 server (which will update a DNS zone) and some other downstream routers. According to RIPE690 it is advised ...
Radu Marinescu's user avatar
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1 answer
86 views

How can I have multiple servers and IPs if I only have 1 ip with gigabit connection?

I have 1 gigabit connection with static public IP address... Without depending on my local ISPs colaboration, is it possible to buy IPs from an online service and route each individual IP to my local ...
adrianTNT's user avatar
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0 votes
2 answers
176 views

Setting FortiGate HA Firewall

I need some advice and guidance regarding setting up the FortiGate HA, My question is focused on WAN side of configuration (not A WAN expert), below are highlight environment 2 ISP WAN-A / WAN-B ...
KurdTech's user avatar
0 votes
1 answer
43 views

Protect public network with virtual firewall w/o control over the gateway

I have a public network, 123.123.123.0/28, and a local network, 192.168.1.0/24. My ISP gateway for the public network is 123.123.123.1. My virtual firewall and router (pfsense) is running inside ...
Demiler's user avatar
1 vote
0 answers
58 views

Guide to starting my own Tier-3 ISP service in Pakistan? [closed]

I'm new to networking. I'm based in Karachi, Pakistan and am a game and simulations developer by profession (Unreal 4 lyf fk Unity). When I came back here from the UK, I witnessed absolute shit ...
Raza Zaidi's user avatar
0 votes
1 answer
139 views

Traffic Flow From the Customer Through the ISP

I am currently learning about BGP at the moment and I have a question about the traffic flow and redistribution. So ISPs typically run some sort of IGP within their AS. If I was to send a packet to ...
Mitrixsen's user avatar
  • 803
3 votes
1 answer
68 views

How do communication networks physically direct traffic? [closed]

I’m curious as to how this would work. I have an ISP that uses Coaxial Cable to deliver its services (this company was one of the original cable TV providers in the neighbourhood, hence why coax and ...
StackQsUp's user avatar
1 vote
1 answer
74 views

CISCO cellular Router cannot reach network via my PC

I configured the cellular and my router is connected to the internet ping (5/5) Success but I still cannot access the internet via PC Here is my running-conf Current configuration : 2271 bytes ! ! ...
breka's user avatar
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2 answers
161 views

BGP outbound traffic engineering in multi-homed network with 2 ISP's

I have network with switches at access layer and 3 host networks, 2 core routers , 2 border routers , that have iBGP connection with each other and ospf with other 2 core routers, also each of them ...
Igor's user avatar
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1 vote
1 answer
483 views

If your ISP already has a gateway, why do you need another gateway with NAT to come before a layer 3 switch?

Please bear in mind that I am learning and have never set up a network with routers and switches myself. Also please bear this is sort of going to be loaded question because there are multiple layers ...
itsmarziparzi's user avatar
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1 answer
148 views

Can you have multiple paths in BGP through different ASes?

In a course about networks in my university, we learnt about how in BGP routes, each AS chooses a single route to each IP prefix (though you may have multiple iBGP routes). Meaning that in the ...
snatchysquid's user avatar
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2 answers
147 views

How can a hostname and ASN be different? [closed]

I've been doing some research to see who really 'powers' the most popular VPN companies which has involved a ton of reverse IP lookups and traceroutes. One thing I keep running in to though is that ...
skarz's user avatar
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1 vote
1 answer
195 views

Is there a difference between BIDI LR and DFB BiD or are they compatible?

My ISP is offering 25GBit Fiber soon and I am looking into the required hardware. One of the devices I will need to purchase is a new transceiver that can handle the speeds. The one my ISP recommends ...
comfreak's user avatar
  • 147
1 vote
1 answer
102 views

How can I use two WiFi routers with one cable to the ISP router?

Let me explain... There is the fiber optic ISP router on the first floor, connected to it via LAN cable is a switch, connected to the switch via LAN cable is a WiFi router on the 7th. I want to add ...
Lausha's user avatar
  • 11
2 votes
0 answers
208 views

Overlapping IP addressing on dynamically assigned wireless VLANs (can Fortigate do this?) [closed]

Broad question touching many vendors. CONTEXT DESCRIPTION For a project of a client of mine (I'm giving the context to make things clearer, please don't reply with "get a professional", I'm ...
user2984629's user avatar
2 votes
1 answer
403 views

In practice, how are BGP Advertisement destinations determined and configured?

Say there is ISP-Alice (ISP-A) and ISP-Bob (ISP-B). They both serve neighboring areas, but they currently only peer with ISP-Charlie. They want to change that and peer directly with each other to ...
Liam Kelly's user avatar
2 votes
5 answers
834 views

If IPv6 exists, why do we still pay for static IPv4 addresses?

Given that there is some ridiculous number of IPv6 addresses per every single person on the planet, why do ISPs still charge for IPv4 addresses? Why not just give the user an IPv6 address? Is it ...
Danny Watson's user avatar
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0 answers
45 views

A possible solution to offloading clients on an existing network

I am working with an existing network that services approximately 1500 rural wireless clients [diagram: Customer], and it uses a single core Arista 7050T layer3 switch [diagram: Main Router] hooked up ...
Escape75's user avatar
1 vote
1 answer
168 views

What is ISP proxy?

One of my customer requested to implement data center for server space rental service. He need to rent his server for data center and ISP proxies. I can setup as a data center. But i have no idea ...
infra's user avatar
  • 3,128
6 votes
2 answers
2k views

Is a point-to-point T1 line literally a line in real life?

In Packet Tracer this is how we draw a WAN link, or a T1 link: Does the "red line" here literally means there is a single cable connecting the two routers in real life? If no, then what are ...
Noob_Guy's user avatar
  • 491
0 votes
1 answer
1k views

Multiple IP address on an unmanaged switch

Sorry if this question have been already asked. My ISP is providing multiple public IP's on an interface. Can I use an unmanaged switch to conect to ISP's interface and then connect this switch to ...
srt243's user avatar
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0 votes
2 answers
181 views

Why are ISPs arranged in hierarchies?

ISPs are organised in a hierarchy where the Tier 3 ISPs are connected to Tier 2, and Tier 2 ISPs are connected to Tier 1 ISPs. Why are they organised in a hierarchy? Is it because if all devices were ...
Ski Mask's user avatar
  • 115
0 votes
1 answer
100 views

Peering of ISPs

How does having multiple peers affect an ISPs performance? If I have 2 option of ISPs to select from, where ISP1 has only 2 peers and ISP2 has 10 peers, which one should I select? Or does number of ...
Yogiraj Hendre's user avatar
0 votes
1 answer
143 views

Is ATM a Wide Area Network?

Is Asynchronous Transfer Mode a wide area network? Or is it just a framing protocol? What I mean by wide area network is that, if there is such a thing called "ATM provider", does it mean ...
Noob_Guy's user avatar
  • 491
0 votes
2 answers
215 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 ...
Noob_Guy's user avatar
  • 491
0 votes
1 answer
207 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 ...
Carles Garcia's user avatar
0 votes
1 answer
2k 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 ...
Graham Warrender's user avatar
0 votes
1 answer
149 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 ...
Michael Marshall's user avatar
0 votes
2 answers
415 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. ...
Not-a-Coder's user avatar
0 votes
4 answers
2k 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 ...
baxbear's user avatar
  • 105
0 votes
0 answers
111 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 ...
vega's user avatar
  • 1
1 vote
4 answers
277 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?
Davide's user avatar
  • 13
6 votes
2 answers
668 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 ...
Dougie Fuoco's user avatar
0 votes
2 answers
70 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 ...
lpydawa's user avatar
  • 265
1 vote
2 answers
1k 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 ?
Taher's user avatar
  • 115
3 votes
4 answers
1k 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 ...
SchoolNet809's user avatar
0 votes
1 answer
75 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 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, ...
El_Dorado's user avatar
  • 103
1 vote
2 answers
232 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 ...
The Pointer's user avatar
0 votes
3 answers
1k 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, ...
A.A's user avatar
  • 551
0 votes
2 answers
79 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 ...
novice programmer's user avatar
0 votes
1 answer
128 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?
Vicebal's user avatar
0 votes
1 answer
1k 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 ...
Number945's user avatar
  • 103
0 votes
1 answer
77 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 ...
Brendan's user avatar
  • 101
5 votes
1 answer
253 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)?...
Roman Starkov's user avatar
2 votes
2 answers
1k 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 ...
rainvillem's user avatar
0 votes
1 answer
80 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 ...
Flying Thunder's user avatar
2 votes
2 answers
6k 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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