Questions tagged [wan]

For questions about Wide Area Networks (WANs).

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16
votes
12answers
36k views

What would cause high latency anytime there is traffic on WAN?

I have a network that has been experiencing slow internet speeds. After a great deal of troubleshooting, I have determined that any streaming content/downloads will cause the latency of WAN traffic to ...
14
votes
1answer
57k views

Why is my Router's WAN IP different from public IP?

My Router's WAN IP is a public IP - 172.100.x.x And my public IP is - 182.x.x.x Why do I have 2 public IP's? Does this probably mean that my router is behind another router? But then what is the use ...
7
votes
2answers
1k views

Multiple WANs/Out-of-band (Cisco 1900)

I've got a Cisco 1900 router which connects to the Internet using a primary and a secondary WAN connection. When the primary connection is up, all traffic use this link. When the primary connection ...
7
votes
3answers
816 views

Cisco 1800 drops link to ADVA

I'm having a problem getting a Cisco 1841 connected to an ADVA WAN box provided by TWTelecom. They've given me instructions to force the fasteternet0/0 100 full duplex on interface 0/0, which I have ...
6
votes
5answers
8k views

What are leased lines, serial lines and dedicated lines?

I hear the terms leased line and dedicated line and want to know what the difference is. For example, is DSL considered a lease line? or is T1 considered a lease line? I hear all these terms being ...
6
votes
3answers
1k views

Media Access Control for WAN protocols (equivalent to IEEE 802.3 Ethernet sublayer)

Ethernet can be divided into 2 sublayers; MAC and LLC. For WAN protocols like PPP, HDLC and frame relay, it is not discussed in regards to protocol sublayer for media access control. On serial ...
6
votes
2answers
4k 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 ...
5
votes
3answers
2k views

Better way to dedicate internet link for Skype other than PBR

My current solution for dedicate internet link for specific applications (eg. skype) is to use PBR with static destination of Skype servers IP addresses. But unfortunately IP address may change/add, ...
5
votes
2answers
8k views

Pfsense and two networks

I am playing around with pfsense and have an issue with it connecting properly to the internet. It has the 1 WAN port by default but I also want to run 2 other networks 192.168.3.0 and 192.168.4.0 on ...
5
votes
1answer
636 views

Design question - branch offices with failover

We're designing a new WAN connection with backup connections to every branch office. Each branch office needs to connect to servers in the main office, but may not connect to each other. What is a ...
5
votes
2answers
3k views

Clustered ASA with Dual WAN Redundancy

Let's assume there are two firewalls (ASA) clustered together and two routers (1800 and 2900) each with it's own WAN link. The two routers are managed from the same ISP (it's just link redundancy). ...
5
votes
2answers
16k views

pfSense 2.3 How to setup each Lan traffic goes only over specific gateway

I am running a pfSense 2.3 box with 4 NICs. Now i have 2 different ISPs (one Cable & one DSL). How Can i configure, that all traffic from LAN1 goes ONLY over WAN1, and all traffic from LAN2 goes ...
5
votes
0answers
212 views

E1 over SDH, CRC increasing

I'm Having problem with CRC on E1 interface, after I found clock slips, I have configured "network-clock-participate wic" and "network-clock-select". But I think that is not the cause of CRC, when I ...
4
votes
4answers
324 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?
4
votes
3answers
2k 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 ...
4
votes
4answers
10k views

Are ping-times directly related to location/distance?

Suppose I want to determine if an IP is located in my country, without a third-party servvice. Could I estimate that to a certain degree by measuring ping times? Or is it better to look at the number ...
4
votes
5answers
36k views

How can 2 computers in different network communicate?

Suppose my friend and I are connected to the Internet via some local ISP (not necessarily same), which means we are on different networks, hence our computers have different private IP addresses. Is ...
4
votes
2answers
5k views

SonicWALL HA w/ Dual WAN HSRP from two redundant switches

We're adding two SonicWALL NSA 2600 firewalls to our current setup. We currently get two WAN connections from two separate Cisco routers running on the same external subnet with what I believe is HSRP....
4
votes
1answer
369 views

Latency in P2P Circuit

I have one P2P Circuit from our HQ to a secondary office. the distance between them is approx 2kms. Earlier when the Circuit was delivered at that time we were having an RTT of 3-4ms. It is a 10Mbps ...
4
votes
2answers
713 views

Multiple error types Cisco 861 router

I have a connection that users complain is really slow at times. My SNMP graphs from Observium don't show the bandwidth being fully used or high latency. They show a lot of errors on the WAN port of ...
4
votes
1answer
626 views

ARP Destination address (internetwork)

Let's say i have the following WAN: Suppose that all arp tables are empty and that E wants to send a packet to A. The E will send an arp request with destination ip of Router 2(unicast), get its mac ...
4
votes
0answers
186 views

Shaping on ES20/7606-S

I've recently moved from point-to-point WAN to a point-to-multipoint WAN, unfortunately this has really messed up my brain...in regards to shaping. These circuits are aggregated into three physical ...
3
votes
8answers
4k views

What is the “technical” definition of LAN and WAN

Most of explanations on internet contend by saying "lan" is over smaller distance, while "Wan" covers wider geography. To make question more clear ? If two computers are on the same "LAN" what is it ...
3
votes
2answers
872 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 ...
3
votes
1answer
128 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 ...
3
votes
4answers
3k 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,...
3
votes
1answer
1k 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 ...
3
votes
2answers
216 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 &...
3
votes
3answers
4k 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 ...
3
votes
1answer
112 views

WAN failover when links stay up/up

If I have 2 possible outbound paths, 1 primary, 1 secondary, and I obviously need the secondary to come up if the primary fails. The problem I am foreseeing though, if the RF signal fails, the links ...
3
votes
1answer
3k views

SonicWall : Configuring WAN X1

I have a modem-router device, the device is connected to a DSL phone line to connect its router to the internet, the device in this setting has a public ip address (provided by the ISP) and a local ...
3
votes
2answers
2k views

How to achieve Redundancy/Failover for two WAN links (not ISPs) ?

We have two wan data links (with two different telecom providers) going from our central office to a remote location. Each data link currently transfers data from different equipment that are in two ...
3
votes
1answer
264 views

Redundancy with Frame Relay

I wanted to understand how redundancy works when we implement Frame Relay to connect between different office locations. Consider the topology here I have two sites A and B each has a pair of Routers (...
2
votes
2answers
9k views

Causes of low SNR

I am using a ADSL 2+ broadband service. My router shows very low SNR margin. While I quite understand what is SNR, I was curious to know what causes low SNR practically.
2
votes
2answers
116 views

Is the Internet essentially a network of routers?

Is the Internet nothing but a globally scattered interconnected routers, and that the connections between them could be via any of Leased Line, X.25, Frame Relay, ATM, MPLS, or Ethernet?
2
votes
4answers
15k 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 ...
2
votes
1answer
900 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
319 views

Optimizing The Cost Per Bit Per Meter

I am working on a problem to minimize load for my thesis. Where the load is taken as the function of amount of traffic (bit) and length (m) to reduce the distance over which a demand is served. My ...
2
votes
1answer
105 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 ...
2
votes
1answer
375 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 ...
2
votes
1answer
10k views

fast ethernet vs serial interface

I have a simple confusion about these two kinds of interfaces: As far as Fast Ethernet is faster, then why it is not used over WAN connections. Typically, network traffic nowadays between any ...
2
votes
1answer
787 views

Multiple Wan Nat with IP SLA

I am trying to setup IP SLA for my WAN interface and want the NAT to be setup to when the link goes down the NAT will switch over. Here is the config: version 15.5 track 1 ip sla 10 reachability ...
2
votes
2answers
624 views

Routing between branches

I have always used eBGP (with private AS numbers) to route between branches and headquarter sites. However, after reading the Cisco CCNP ROUTE Foundation Learning Guide, it states that best practice ...
2
votes
1answer
4k views

how do I count LANs and WANs given a network topology?

how do I count LANs and WANs given a network topology? The question is quite straightforward. I find it difficult to know when something is a LAN or when it isn't. Same goes for WAN. Here's an ...
2
votes
1answer
1k 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
872 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 ...
2
votes
1answer
2k 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
2answers
2k 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 ...
2
votes
2answers
2k views

pfSense - High Availibility Cluster

I'm setting up a High Availability Cluster with two pfSense SG-4860 routers. I have a question about setting up the network. Here is the diagram they provide: I have a question about the WAN part. ...
2
votes
1answer
266 views

Can Sonicwall TZ105W W0 port be configured as WAN?

I need to setup a VPN with a remote location which has no wired Internet access. At the most we can get a GSM Wi-Fi hotspot for Internet access. I am hoping to install a SonicWall TZ105W and put W0 in ...