Routers

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A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

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What are the steps necessary to create a VPN on a SonicWALL TZ600 router?
0
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I have two routers. The routers are using EIGRP.   Primary is a Cisco 2921 Backup is 4321.
One is a primary and the Second is a backup.
When the primary router goes down all connectivity functions transfer to the Second router.
 
 
What I would like to know is this,
When the connectivity function transfer to the backup router And connectivity is restored to the Primary,
How do the Workstations, printers - ip address get transfer back to the Primary router. ??
 
 
Do all network devices stay on the backup until someone transfers them and if so, What is the commands
or process to bring them over to the Primary.

Note: This is all the  Detail I have.
0
Have been on a Cisco/Linksys E3000 router for a few years.  My Mitel 5360 IP phone has worked flawlessly connecting to my office the entire time.

Replaced my router with a Netgear Nighthawk X4 R7500V2.  The IP phone gets an IP address (DHCP) but hangs at "Contacting Server."  Cannot connect to my office.

Reconnected the old router and the IP phone works fine so it's not the phone.  

Suspect I have to open up a port on the new router but have no idea where to start.

Any suggestions appreciated.
0
Currently I have Spectrum modem / router . one port has DHCP enable with a dynamic public IP that is connected to a switch and all devices use that.

Anther port on the spectrum modem / router is connected directly to one computer that has a STATIC public IP and is working fine.

I want to use the Ubiquiti Unifi Security Gateway (USG) to be my router and have the specturm be just a Modem.

When I change the router/modem to be just a modem and connect it to the USG the regular network is fine, but that computer that has a static public IP can't get online .

Suggestions ?
0
Hello

we have a zywall 2 plus which needs to establish a site to site vpn to a remote office.  

the remote office is not under our control and i'm looking to learn how to establish nat translations to change the private ip addresses across the ipsec tunnel.

site local to the zywall is 10.0.0.1/24 on lan1 in the zywall
far side of the tunnel is 10.186.53.0/24

from the zywall side, traffic bound for 10.186.53.0/24 from 10.0.0.0/24, zywall needs to nat from 10.0.0.0/24 to 192.168.10.0/24 then send downt the tunnel

from the far side, traffic from 10.186.53.0/24 bound for 192.168.10.0/24 goes down the tunnel, the zywall needs to nat 192.168.10.0/24 back to 10.0.0.0/24 on the way back in

where do i set this nat in the zywall?

here's what i have so far, but something's off:

gateway policy:
my ip address:              static wan ip
remote gateway:          static remote peer wan ip
authentication:             PSK
local id type:                 ip
content:                          0.0.0.0  (defaults to static wan of zywall)
peer id type:                  ip
content:                        0.0.0.0  (defaults to remote gateway wan)
ike proposal:              main / AES128 / SHA1 / 28800 / DH2

network policy: (mostly just guessing at this)
virtual address mapping rule:        port forwarding rules
type:                                                   many one-to-one
private starting ip                            10.0.0.1
private ending ip        …
0
Screen-Shot-2017-10-16-at-9.01.37-PM.png
in the topology above , I  configured on R3 area 1 as stub in the first LAB then configured the same area 1 as NSSA in the second LAB.
In matter of OSPF Routing table Stub or NSSA the effect is the same , both have made R2 and R1 unable to reach any interface of R3 and the other way around also is true.

In matter of LSDB there was difference,, NSSA has created LSA type 7 on R3 area 1  

***My question is what's the purpose of LSA 7 if OSPF routing tables gave the same results between  , when I configured area 1 as Stub then NSSA ?


the output below is when I configured area 1 NSSA on R3

R1#sh ip route ospf 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, + - replicated route

Gateway of last resort is not set

      2.0.0.0/32 is subnetted, 1 subnets
O        2.2.2.2 [110/2] via 192.168.12.2, 00:00:45, FastEthernet0/0
O IA  192.168.23.0/24 [110/2] via 192.168.12.2, 00:00:45, FastEthernet0/0
R1#

Open in new window


R2#sh ip route ospf 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, + - replicated route

Gateway of last resort is not set

      1.0.0.0/32 is subnetted, 1 subnets
O        1.1.1.1 [110/2] via 192.168.12.1, 00:03:24, FastEthernet0/0
      11.0.0.0/24 is subnetted, 1 subnets
O E2     11.11.11.0 [110/20] via 192.168.12.1, 00:03:24, FastEthernet0/0
R2#

Open in new window


R3#sh ip route ospf 
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, + - replicated route

Gateway of last resort is not set

R3#
R3#

Open in new window


Thank you
1
I am hitting a mental road block here. I am needing to configure a TZ300 for Virtual Office access. I have a Comcast business router with an ip. How do I set up my WAN interface for access? I have the LAN setup 192.168.1.1/24
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I have :

R1---R2---R3

OSPF is configured at the Global configuration level on all routers.

R1  has 2 loopbacks: loopback0 (1.1.1.1/24) and loopback1 (11.11.11.11/24)
R1 has interface fa0/0 (192.168.12.1) connected to R2

Router OSPF 1
Network 1.1.1.0 advertised into area 0
Network 192.168.12.0 into area 0

** 11.11.11.0 network is not advertised, it is redistributed

R2 has loopback 2.2.2.2/24
R2 has interface fa0/0(192.168.12.2) connected to R1
Network 2.2.2.0 advertised into area 0
network 192.168.12.0 avertised into area 0

R2  has also interface fa0/1(192.168.23.2) connected to R3
so R2 has advertised Network 192.168.23.0/24 into area 1

***Let 's not worry about R3 , since it has all its interfaces in area 1

Now on R1 : I have "redistribute connected subnets"
this has redistributed the prefix 11.11.11.0 into area 0

Well, when I check R1 ospf routing table there is no prefix 11.11.11.0 , it shows on its global routing table as directly connected.

on R2, the prefix 11.11.11.0/24 shows as E2.

My question now is why in R1 the prefix 11.11.11.0 is not showing as E2 ?

Sorry I have my topology and configuration in the Lab , this is why I cannot paste the topology and/or the configuration.

Any clarification will be very much appreciated.

Thank you.
0
can anyone direct me to a very simple port forwarding for cameras?  i've setup the following but somehow its not working:
here is the acces-list and nat rules:
access list:
access-list outside_access_in; 2 elements; name hash: 0x6892a938
access-list outside_access_in line 1 remark allowing outside to access camera inside
access-list outside_access_in line 2 extended permit tcp any object 192.168.1.102 eq www (hitcnt=55) 0x84d9271b
  access-list outside_access_in line 2 extended permit tcp any host 192.168.1.102 eq www (hitcnt=55) 0x84d9271b      

nat rules:
(inside) to (outside) source static Camera interface  service any 192.168.1.102
    translate_hits = 2449, untranslate_hits = 3013
    Source - Origin: 192.168.1.102/32, Translated: 114.142.223.135/32
    Service - Origin: any, Translated: tcp source eq www
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When I browse a http site I got the following screen.Verizon.JPG
same is if I browse a https site but using the ad link in the browser instead of the direct link http.jpg
I did a trace from the router (not from the computer) I got the following results see attached

On another computer on the network I do not have the issue, but have a wireless access point that does have the issue

I already did a ipconfig /flushdns

Please help
Trace.txt
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I have a new Windows 10 Prof. PC that will not VPN into our office. All other computers, Windows 7, 10 and Apple can VPN in just fine. When the user tries to connect I comes back with a Can't connect to
The VPN connection between your computer and the VPN server could not be completed. The most comman cause for this failure is that at least one internet device (for example, a firewall or a router) between your computer and the VPN server is not configured to all Generic routing encapsulation (GRE) protocol packets.
The setting I tried and works on all other Windows 10 except this one is
Type of VPN: Auto and PPTP (works on other PCs)
Please advise thanks
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I have   setup  2 separate Labs ,  VPNV4 and AToM.
I found out that VPNV4 configuration is very complex compared to the configuration of AToM(Any Transport over MPLS) which is very simple.
Now, I am not sure if there is a catch behind this simplicity. I mean is VPNV4 capable of offering more services than AToM.
Thank you


VPNV4VPNV4 Lab:


AToM LabAToM Lab:
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What are the steps to add IP address DHCP MAC address reservations to a SonicWALL TZ 600 router?
0
I am trying to bring up my second of four tunnels. The first one was easy, but adding on from there is where things get gamey for me. After configuring the routers identically, and adding the appropriate peer list entries and tunnel groups to the ASA,

Here is all information pertinent to the L2Ls:
!!!!THE ENTRIES WHICH BRING ME SANITY!!!!
name 2.2.2.2 BLDG2EX
name 1.1.1.1 BLDG1EX

!!!!NETWORK OBJECTS!!!!
object-group network MYORGNET
 network-object 10.10.0.0 255.255.252.0
object-group network BLDG1NET
 network-object 192.168.253.0 255.255.255.0
object-group network BLDG2NET
 network-object 192.168.251.0 255.255.255.0

!!!!ACLs!!!! 
access-list 101 extended permit ip object-group MYORGNET object-group BLDG1NET
access-list 101 extended permit ip object-group MYORGNET object-group VPNNET
access-list 101 extended permit ip object-group MYORGNET object-group BLDG2NET
access-list split_tunnel standard permit 10.10.0.0 255.255.252.0
access-list split_tunnel standard permit 192.168.253.0 255.255.255.0
access-list L2LSITES extended permit ip object-group MYORGNET object-group BLDG1NET
access-list L2LSITES extended permit ip object-group MYORGNET object-group BLDG2NET

!!!!NAT!!!!
nat (inside) 0 access-list 101

!!!!CRYPTO!!!!
crypto ipsec transform-set MYORGSET esp-3des esp-md5-hmac
crypto ipsec transform-set L2LSET esp-aes esp-md5-hmac
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map 

Open in new window

0
Hi,

I have a small network with about 40 machines on and recently had a second internet connection added to the network for a certain set of users. These users have static IP addresses so I changed their default gateway from 254 (existing internet gateway ip) to .253 (new faster connection). Although this is working for the most part, the machines seem to have some issues access shares on the network and Ive had to resort to using local accounts of the network resources rather than the domain accounts since I get errors indicating there is no domain controller on the network to service the access request. When I change the gateway back to the previous setting, things start working again.

The DC is an SBS2011 box and its on 192.168.16.2 whilst the internet routers on .253 and .254 respectively. The clients are a mixture of Win 7/10.

Why would changing the gateway address have this effect and how can I get around it?

Ta
SycamoreIT
0
We need to block and monitor website access specific to certain users via a centralised Router / firewall or server program for a small business eg we need to allow access to you tube but allow some you tube pages through . Any recommendations please ?
0
I manage I.T. for a small non-profit theatre company, and I am not particularly strong on networking. We have a single 100 mbs internet connection (Comcast) and support both wired ethernet and wireless access. Our boxoffice computers and a couple of administrative computers are connected to the network via ethernet. We also have actors and staff who connect various devices via wifi. The problem is this: the boxoffice computers are critical because if we can't sell tickets, we can't exist. But there are times (e.g., when rehearsals are over) when everyone jumps on their wireless devices and use all the bandwidth, so boxoffice and admin computers grind to a halt.So my question is: is there a way to place a limit on the amount of bandwidth available to the wireless routers (we have several access points across our campus) and maintain availability of bandwidth to the ethernet network? The people and devices accessing via wifi is constantly changing, so setting individual limits by IP is not practical. Any ideas would be appreciated.
0
For some reason no one in the company can visit https://www.amctheatres.com/ we get the following error message.
"
The requested URL was rejected. Please consult with your administrator.

Your support ID is: 15532489170173462385

[Go Back]

It works fine outside of the network.
I have checked DNS for root kits and nothing came up. I changed the DNS on two computer to point to google (8.8.8.8) same result.

I did trace route and it looks normal.

Tracing route to 169.224.240.210 over a maximum of 30 hops

  1     2 ms     3 ms     2 ms  x
  2    <1 ms    <1 ms    <1 ms  x
  3     2 ms    16 ms     7 ms  r-uwmadison-isp-ge-7-0-1-2931.wiscnet.net [140.189.64.109]
  4     6 ms     6 ms     6 ms  r-222wwash-isp-ae2-3900.wiscnet.net [140.189.9.77]
  5    28 ms    22 ms    23 ms  madix-hurricane.net.wisc.edu [144.92.233.244]
  6    38 ms    19 ms    24 ms  10ge14-2.core1.chi1.he.net [184.105.222.57]
  7    24 ms    23 ms    23 ms  100ge14-1.core2.chi1.he.net [184.105.81.97]
  8    35 ms    29 ms    29 ms  100ge12-1.core1.mci3.he.net [184.105.81.209]
  9    30 ms    30 ms    34 ms  arsalon-technologies.gigabitethernet1-9.core1.mci3.he.net [184.105.250.62]
 10    31 ms    30 ms    30 ms  204-13-97-250.arsalon.net [204.13.97.250]
 11    40 ms    40 ms    40 ms  169.224.240.210

I did a packet capture and it looks normal.

so I am not sure what the issue is.

Any thoughts would be appreciated. Thanks!!!
0
I need to create a vpn from cisco router rv016 to home router. And at home any equipament can connect to the VPN and access the office. How can I do that ? What router I can use at home ?

Thanks
0
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I have a  topology with 1 x Cisco WS-6509-E Layer 3 Switch connected to 1 x HPE FF 5700-40XG-2QSFP+ Switch and another HPE FF 5700-40XG-2QSFP+ Switch. These HPE FF 5700s are each connected to 2 x HP 5130-48G-PoE+-4SFP+ (370W) EI Switches and 1 x HP 5130-24G-4SFP+ EI Switch. The Cisco WS-6509-E has the udld aggressive command globally configured. I am trying to establish two connections running from each HP 5130 switch to each of the HP FF 5700s. I have the udld aggressive command configured globally on the Cisco WS-6509-E. On two of the HP 5130s I have the lldp compliance cdp command configured but on one I don't have it configured. When I try to make a dual connection from the switch running from the switch with lldp compliance cdp command configured, I get the link to one of the HP FF 5700 placed into err-diabled. The logs below show what happened:

Jul 15 11:08:28.682 PDT: %UDLD-SP-4-UDLD_PORT_DISABLED: UDLD disabled interface <port>, unidirectional link detected
Jul 15 11:08:28.682 PDT: %PM-SP-4-ERR_DISABLE: udld error detected on <port>, putting <port> in err-disable state
Jul 15 11:08:28.758 PDT: %PM-SPSTBY-4-ERR_DISABLE: udld error detected on <port>, putting <port> in err-disable state

Should I undo lldp compliance cdp command on the HP 5130 switches in order to get a dual connection to the HP FF 5700s?
0
Hi Experts,

we have an exchange DAG in our datacenter EXCH2013.
Now we have routers which are built in in garages and they are not connected to our network.
On the router you can set a SMTP Server not more.

I sit possible to reach my exchange server from external to be used as SMTP server ?
0
Unable to ping a host directly connected to a port on an ASR901. Port has SVI configs and belongs to a bridge domain. Is their any specific commands to activate the port to allow ping? The port is showing connected but unable to ping to the host that is directly connected and vice versa.
0
Hello experts, I have 2 questions, I need technical information thank you


1/What is the effect of the routing table on the performance of a router


2/how a router could optimize the size of its routing table
0
mpls
on the topology above MPLS IP command is enabled on all physical interfaces of the routers. OSPF is configured on all physical and Loopback interfaces of the routers.
I would like to know if  IP packets from end to end get Tunneled through MPLS "Tunnel" ?


PE1#sh run | beg router ospf
router ospf 1
 log-adjacency-changes
 network 2.2.2.2 0.0.0.0 area 0
 network 192.168.23.0 0.0.0.255 area 0

interface FastEthernet0/1
 ip address 192.168.23.2 255.255.255.0
 mpls ip
 
P#sh run | beg router ospf
router ospf 1
 log-adjacency-changes
 network 0.0.0.0 255.255.255.255 area 0

interface FastEthernet0
interface FastEthernet0/0
 ip address 192.168.23.3 255.255.255.0
 mpls ip
 !
!
interface FastEthernet0/1
 ip address 192.168.34.4 255.255.255.0
 mpls ip

PE2#sh run | beg router ospf
router ospf 1
 log-adjacency-changes
 network 4.4.4.4 0.0.0.0 area 0
 network 192.168.34.0 0.0.0.255 area 0

interface FastEthernet0/0
 ip address 192.168.34.4 255.255.255.0
  mpls ip


PE1#traceroute 4.4.4.4 source loopback 0            

Type escape sequence to abort.
Tracing the route to 4.4.4.4

  1 192.168.23.3 [MPLS: Label 17 Exp 0] 48 msec 20 msec 20 msec
  2 192.168.34.4 44 msec 44 msec 20 msec
PE1#
0
Hello I have a digital signage software server to remote led screens ..its   a web sever run on port   777  and 5222 it was work fine for few months my puplic ip was started by .195.xxx.xx.xx but now  it's stop i cant ping my pulic ip and all the ports is closed when I checked them by can you see me . Com now my public ip start by 63.xx.xx.xx what I can do to run the server again


Thank you
0

Routers

47K

Solutions

30K

Contributors

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.