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Questions tagged [wan]

For questions about Wide Area Networks (WANs).

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2answers
39 views

Addressing for a WAN, LAN and DMZ

I was wondering about the addressing for certain types of networking areas... I use 192.168.0.0 for a LAN network, 10.0.0.0 for a WAN and 172.16.0.0 for a DMZ. But I've been confused why a 10.0.0.0 ...
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1answer
51 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 ...
3
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4answers
130 views

WAN encapsulation

I am having some trouble understanding why does a WAN link need encapsulation, such as MPLS or frame relay? Is it merely to encrypt the info from one LAN to another LAN across the internet?
3
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1answer
77 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 ...
1
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1answer
52 views

Difference between WAN and VPN(tunnels)

I got my CCENT and working on ICND2 to get my CCNA. I am stuck on this topic and am unable to grasp the context. WAN and VPN and how they differentiate. My understanding is we need WAN for "Physical" ...
0
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1answer
28 views

CSU/DSU's and DSL modems

I read a few times that DSL modem isexample of CSU/DSU. To my understanding CSU/DSU connect digital communication method to digital while DSL modulate digital communication to analog. If so, how can ...
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0answers
12 views

CSU/DSU and Modems [duplicate]

So after a lot of research over the internet i couldn't get to a clear answer To my understanding so far modem is: piece of hardware which enables us convert digital signal to analog signal(and vice ...
1
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1answer
86 views

packet-switching, circuit-switching, PVC and SVC

I am studying by this book: West, Jill. Network+ Guide to Networks.. [VitalSource]. What I understand from what is explained there is that there are two kind of virtual circuit technologies PVC and ...
2
votes
1answer
36 views

Wireless Controller 5520 Creating a dynamic interface

I'm hoping to determine the least intrusive way to configuring my WLC. I am working through the GUI interface and have created a new dynamic interface [Controller-> Interfaces] When I went to ...
0
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1answer
164 views

Access to a server behind the SonicWall from the LAN using Public IP addresses

We have a SonicWall TZ 400 with a Comcast Modem in Bridge Mode. Everything works fine, except the fact that the exposed services on the LAN couldn´t be reached using the public IP of the WAN from the ...
0
votes
1answer
101 views

WAN/Campus network design - Learning purposes

I am trying to build a WAN connecting various LAN's via frame-relay for learning purposes, i do not have that much experience with frame-relay or network design (mainly creating LAN's and connecting ...
-2
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1answer
35 views

Super-noob asked to build a WAN [closed]

Worst case scenario here - software/sysadmin IT guy being asked to build a future proof WAN for 5-6 large sites over 50 mile radius. Must be end-to-end secure as will include personal and medical data....
1
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1answer
346 views

Load-balancing one VPN-connection over multiple WANs

My internet connection will be provided by 4 different WANs (each 250 Mbit down, 100 Mbit up), which should be load-balanced to one 1 Gbit connection (full duplex, most likely ethernet (should be ...
0
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1answer
78 views

Cisco 892 Low WAN Speeds [closed]

I'm getting really not-gigabit-close speeds on my Cisco 892 Router. LAN speeds are fine (750-800Mbps) but WAN speeds are awful. I have a PPPoE connection, and when doing a speedtest I get an average-...
1
vote
2answers
161 views

How does WAN work?

I understand the basics. WAN is a network that connects multiple LANs together. Usually the router is the connection between the LAN and WAN. But I have some questions books and the internet could not ...
3
votes
2answers
515 views

load balancing with multiple ISP, one router and asa 5520

I connected different two ISPs to the RV340 with dual WAN support. I want to connect the ISP - Router - ASA in the normal way, and connect the L2 Switch after the ASA. I need to know how to do DHCP ...
1
vote
1answer
401 views

Same subnet on two firewalls

I came across a network setup in this way: Cisco device provided by the ISP serving as a bridge between the fibre line and the LAN. Cable coming out from port eth0 of the Cisco above going to a ...
2
votes
1answer
136 views

Frame relay, PVC and DLCI

Regarding the frame relay technology, could you confirm to me that traffic using permanent virtual circuit use the same ISP routers in the path for all packets sent ? I'm a little bit confused. Frame ...
3
votes
2answers
55 views

Creating bandwidth with multiple WAN and LAN ports

I have a network with roughly 50 machines all on one LAN, consisting of Linux, Windows, and server machines. I have an untangled u150 firewall/router. I have the ability to add an additional WAN &...
2
votes
1answer
383 views

About BEST and MAX MTU with PPPOE + PPTP

About BEST and MAX MTU with PPPOE + PPTP in the router. I have Has been setup WAN to PPPOE and MTU is 1492, because 1464 is maxed on my ISP. and I have connected PPTP on the same router, and MTU is ...
2
votes
1answer
736 views

Connecting an SRX chassis cluster to redundant upstream WAN links

I've been tasked with migrating some Juniper SSG 140's in an active/passive cluster to an SRX 340 cluster. I'm very familiar with ScreenOS, but am still learning JunOS. Currently, we're connected to ...
1
vote
1answer
116 views

HSRP - 2 separate Virtual Router for Distribution and WAN?

I've got 2 Core-Multilayer-Switches connected with each other with two cables (trunks). They are also connected with the distribution-switches (and each switch is connected with both core-switches). ...
4
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3answers
1k views

Error Detection across OSI layers confusion

Confusion: How does the transmitter know that his information( bits in physical layer, frames in data link layer, packet in network layer ) was transmitted correctly to the receiver? I know that in ...
1
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1answer
206 views

SONET/T-Carrier differences - MPLS/VPLS bandwidth

Could someone explain to me simply what is the difference between SONET and T-Carrier? I know that the ISP generally uses SONET on their infrastructure (Ciscopress 2017, 1.2.1.2 section, http://www....
1
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1answer
324 views

What problem does Frame Relay or ATM solve that Ethernet does not?

Frame Relay is a technology that exists from 1988 (more or less). Ethernet is older (mid 70's). Why we classify as a WAN technology Frame Relay if Ethernet can do the same (and even better!)? As far ...
1
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1answer
107 views

Using an ASE(MPLS) line to route datacenter WAN traffic to office

im trying to route the Internet from our Datacenter to our Office over an AT&T ASE line (similar to an MPLS). At first I was going to just add the office subnets to the router in the datacenter ...
1
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1answer
236 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
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1answer
72 views

diff btw PTSN and DSL?

I have seen DSL compared to PTSN (public switched phone network). What are some of the major differences? Is there anything about this answer to a similar question [https://www.quora.com/What-is-...
0
votes
2answers
258 views

Set up Failover WAN with Double NAT (SonicWall)

I am trying to set up failover WAN on a SonicWall TZ300. My primary cable connection comes in via static IP (modem is bridged) to interface X1. My cellular backup is also a static IP to interface X2 (...
1
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1answer
72 views

Carrier Ethernet

On my courses slide there is a chapter about this concept. I thought it was some sort of idea about replacing legacy and non-flexible technologies as SONET and so on in favor of Ethernet family ...
-2
votes
1answer
283 views

what is POOl in lease line i got 30 wan [duplicate]

Please help me Proposed IP Pool WAN/30 & LAN/29 what is the meaning how computers usable for this connection.this lease line connection optical fiber
1
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1answer
387 views

Unable to reach public IPs of servers behind ASA 5512

We replaced a Meraki MX with a Cisco ASA, and I'm unable to reach the public IPs of servers behind our firewall now. The server has working Internet access. All packet tracer runs show successful ...
1
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1answer
212 views

Unable to properly configure ASA 5512 with WAN IP

I have a /28 block of public IPs from Comcast. I'm trying to put a public IP directly on the ASA outside interface, but when I do I cannot ping 8.8.8.8 or the Comcast modem. Internal communication is ...
1
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1answer
154 views

WAN project requirements increasing

Okay so I was contracted to provide to design a new WAN topology for quite a large company in my country and designed them a fairly standard IPSec over DMVPN type design. So you can see the above ...
0
votes
1answer
108 views

Pass traffic to ASA from Spokes via Hub

Good afternoon, The network will be MPLS in the future and I am thinking about new design for it. We will have hub router with ASA behind and couple spokes without the need for IPsec (at least for ...
1
vote
1answer
473 views

vSRX : several public addresses on loopback interface

I have an issue when I try to configure several ip addresses on the loopback interface on a vSRX cluster. Here is my setup (in gns3) : vSRX-1 and 2 are in cluster mode. VyOS-1 and 2 are BGP routers ...
0
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1answer
2k views

Correct way to set up network with multiple routers/access points over fibre/ethernet [closed]

Heading Below is a network map for a network. Router 192.168.0.1 has DHCP enabled. Routers 0.2, 0.3, and 0.4 are connected via their LAN ports to router 0.1 by ethernet cable, and have DHCP disabled ...
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0answers
74 views

Configuring Cisco ISR router as dial-up server

I am working on replacing Cisco AS5350 with Cisco ISR 2900 series , on the old setup I have only one profile to apply for the incoming calls and one IP Pool, but with the new setup I have new ...
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2answers
236 views

Running office WAN via MPLS connected Datacenter's WAN connection. Thoughts?

Some folks at my work are thinking about getting rid of our office (HQ) WAN line from ATT, increasing the speed of our Datacenter connection and then running the office WAN(Internet) through an MPLS ...
6
votes
2answers
3k views

Fortigate 100D internet on VLAN wan port

I am fairly new towards Fortigate firewalls and I am trying to set up one FortiGate 100D running firmware v5.0 as a router for a hotel network. I have 2 ISPs using PPPoE connection that runs on VLAN ...
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4answers
7k views

What is a “routable” IP? [closed]

Short bg: I wanted to host a website on my laptop (192.168.0.102) via apache server. I set up port 8080 and forwarded the port that I was able to access it via 192.168.0.102:8080. Then there was a ...
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2answers
613 views

Sonicwall NSA 5600 Dual Wan / HA + Dual Switches how to setup fault tolerance and VLANs

I have a client that has purchased two SonicWall NSA 5600s and they would like to run two WAN connections from separate providers into two SonicWalls into two Cisco switches so that they can achieve ...
2
votes
2answers
1k views

How to access other computer from LAN through interet

I have 2 computers and both are connected to same network via WAN. Now i have started 1 application on 8080 port and also i have open 8080 port on my router. Now my 1 computer's ip - 192.168.0.150(on ...
1
vote
1answer
547 views

How to detect IP conflict in WAN and best practices [closed]

I am working on a WAN setup. Normally, the user IPs are assigned using DHCP, but users accidentally set their IP to static, which can causes 2 computers in network have same IP in same subnet. How ...
3
votes
2answers
2k views

How can multiple devices share an IP across the internet?

I do realize that most LANs sit behind a device running NAT, which translates the users private IP address to a public IP address. My question is still if you are trying to connect to a private device,...
1
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2answers
1k views

How WANs work and why it is it bad to run DNS and DHCP on a router?

I have some networking questions about isolating networks and why it's bad to run DHCP and DNS on a router and should be run on a server. Question 1: What is the purpose of the WAN interface and how ...
0
votes
2answers
110 views

Unable to access local server via domain [closed]

I have a lan server with websites that need to be accessed remotely and locally via domain names. The domain dns is setup to my ISP static ip, and router's firewall is open on port 80 and is ...
1
vote
3answers
360 views

spanning tree at layer 3

we want to prevent loops in the network be it LAN or WAN. However for layer 2 LAN networks STP is used to prevent looping switches. However at layer 3 TTL field is used. why not use STP for layer 3 ...
1
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1answer
333 views

What is the ports that I should close in firewall to protect my LAN?

I use a firewall with two interfaces to protect my network but I don't know witch ports to close or open in LAN and WAN interface ? thanks for your help !!
1
vote
4answers
2k views

Identifying WAN or LAN side IP addresses on cisco routers

I have a requirement to regularly produce spreadsheet showing Cisco router interface information, in particular bandwidths of each interface and IP addresses. I have access to a network management ...