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Questions tagged [point-to-point]

For questions about Point-to-point network links, where the term point-to-point means a wireless data link between two fixed points or in a switching world, where all ports are a series of point-to-point circuits, via micro segmentation. The tag can also be used in relation to a point to point tunnel (PPTP) or VPN connection etc.

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1answer
22 views

Issue with Connectivity Over Next Hop Gateway (ASA) to Point to Point

I'm having an issue routing traffic from a backup gateway on a different ISP, to our main gateway, which uses a point to point connection to a data center, with the majority of our infrastructure. ...
2
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1answer
48 views

Is it worth the effort to split up in layer 3 with point to point links? [closed]

I have this technical question. With my family we have a little business. I got to provide internet access to three places, separated a few hundred meters each other. I need to allow to watch the ...
19
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1answer
3k views

What is the practical use of a /31 CIDR or 255.255.255.254?

With a /31 subnet, we are left with zero usable hosts. The /31 subnet only has two hosts - one for network and another for broadcast. I am wondering why would someone ever use this subnet.
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3answers
2k views

Is Ethernet a broadcast or point-to-point protocol?

Theoretically speaking, as far as I know Ethernet was developed to be used as a broadcasting protocol and technology. I guess nowadays it is not being used this way. Since ALL the examples I see refer ...
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3answers
101 views

Does a dial-up modem support multiple users?

Since I have never worked with a dial-up modem, I was wondering if it created an internet connection for only one user, a point-to-point connection, or if it also supported multiple users.
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1answer
435 views

What's the difference of TR-069 and Point-To-Point protocol?

I've read my ISP, Telecom uses a Point-to-Point regarding the ADSL networking over ATM nowadays (which is rarely used in my country, and it's non-commercial). My friend told me it actually uses TR-069,...
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2answers
2k views

point-to-point VS point-to-multipoint

I readed some articles but I still don't undestand the difference, is point-to-point transmites unicast messages, so point-to-multipoint uses broadcasts ? is point-to-point consist of one dedicated ...
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2answers
402 views

OSPF Point-To-Point Question

I've consulted the spec https://www.ietf.org/rfc/rfc2328.txt and have googled to the end of the internet but I'm confused on OSPF Point-To-Point. If I have the following: Link State ID: 4.4.4.4 ...
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1answer
142 views

Network failover from PTP Wirless to VPN

I have a ptp wireless network that spans 20 miles from one location to another. It works great. This is a critical network connection for us. I would like to have a vpn backup in case it should ever ...
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4answers
131 views

Point to Point Leased Lines - Do they lay fibres just for that purpose?

Say I have a remote data center in LA and my office is in San Diego. When you say I have a site to site dedicated line between the data center and my office, does it mean fibre lines which do not ...
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1answer
323 views

Wifi link over water [closed]

As I've come to understand, water can interfere with wireless data links over vast bodies of water due to the signal reflecting off the water. What alternatives are there to transfer data wireless ...
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2answers
68 views

Is PPP used to connect immediately adjacent hosts on a network?

I know PPP is used for point-to-point connections. The Wikipedia article for "point-to-point" says that the term is used to refer to a wire that links only two computers or networks, as opposed to, ...
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1answer
5k views

Point-to-point vs unicast, and multiaccess vs multicast/broadcast?

From Tanenbaum's Computer Networks: Point-to-point links connect individual pairs of machines. To go from the source to the destination on a network made up of point-to-point links, short ...
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3answers
5k views

Point to point LAN using two sonicwalls at seperate locations

We have a two-location business with our head quarters in Arlington, and a remote office in Dallas. Currently, both of our offices are running a sonicwall NSA 2600 and hold a VPN tunnel between each ...
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2answers
397 views

Netgear switch required default gateway for point-to-point link [closed]

So, my Netgear switch died, and after factory resetting it, I noticed that I was unable to connect to it. The Netgear was configured for 192.168.0.239/24, and I configured my windows PC to 192.168.0....
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4answers
11k views

OSPF Election with a /30 link?

I have a few /30 subnets connecting OSPF routers over a broadcast capable link.. Should I also configure the interfaces involved in the link to ip ospf network point-to-point? Or does it matter? The ...
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1answer
205 views

Hub-Spoke topology — L3 Links use multiple /30s vs single /24 shared?

I wanted to ask the community their thoguhts on the pros and cons of this scenario. I have a few L3 switches with their own independent VLANS connecting to a a set of stacked switches over a port-...
3
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1answer
488 views

Point-to-point T1 over fiber using media converters

So I recently purchased some media converters to take our T1 lines, that currently run over copper stretch far past it's limits, over some new fiber we had installed. They didn't work. I am a novice ...
2
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1answer
63 views

What could cause a previously working point to point to be accessible from only one side? [closed]

I have two sites that are connected using a pair of Motorola Canopy 5.7 Ghz backhaul units. They have been working for years without a problem but this morning we had a power outage for a few hours ...
3
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2answers
234 views

Improving design of a point-to-point layer on top of a byte-oriented protocol [closed]

I want to design a very simple, efficient protocol layer, point-to-point, that uses a UART on a low-end 8-bit microprocessor. It has extremely limited RAM, and only the most simple arithmetic ...
2
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1answer
1k views

Securely sharing access across subnets with point to multipoint wireless [closed]

I might be over thinking things, but I'm lost. I'm trying to modernize our farm. Cable broadband comes into the farmhouse. Spread throughout our multi-acre property, we have a total of 7 buildings (...
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2answers
751 views

ISIS p2p on Ethernet media

I am looking for technical clarity on why someone should / shouldn’t use ISIS p2p topologies on Ethernet media. Ethernet is a broadcast medium , however if it’s configured as a p2p link with /31’s ...
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3answers
2k views

When is /31 recommended over /30 in P2P links? [duplicate]

For your average enterprise network, what are the pros and cons for using a /31 mask on point-to-point links with private addressing over the generally accepted practice of using /30? There's really ...
13
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4answers
5k views

/31 Point-to-point bitmasks

When is it appropriate to use a /31 network in production, and is using them considered good practice? On a point-to-point link, broadcasts shouldn't be required, so is there any compelling case for ...