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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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Dear Wizards, we have strange problem with our network; our devices are Cisco router 3925, core switch 3750, access switch 2960. There are several subnets, we created a extended Access list to allow all these subnets and NAT all of them via router's WAN interface (overload) and everything works normally (For example: they can access a Web Server)

But one day, users in a subnet said that they could not access Web Server but Internet is OK. When we create a new Access list, permit this subnet and NAT it via a  (overload) Pool of public IP addresses, then they can access that Web Server again.

What is the problem here? and how can we avoid it? Many thanks in advance.
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Hi, I have used Cisco's RV VPN routers for quite some time, and used the PPtP function on most of them they have always worked, untill now.  By now I mean the last year or so of them, I can enable the server, create the users, but the client errors out when trying to connect.
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I have  R1 that has learned EIGRP routes from R2  as shown below.



R1(config-std-nacl)#do sh ip route                
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

      10.0.0.0/8 is variably subnetted, 7 subnets, 7 masks
D        10.1.0.0/16 [90/156160] via 192.168.12.2, 00:00:08, FastEthernet0/0
D        10.2.0.0/17 [90/156160] via 192.168.12.2, 00:00:08, FastEthernet0/0
D        10.3.0.0/18 [90/156160] via 192.168.12.2, 00:00:08, FastEthernet0/0
D        10.4.0.0/19 [90/156160] via 192.168.12.2, 00:00:08, FastEthernet0/0
D        10.5.0.0/20 [90/156160] via 192.168.12.2, 00:00:08, FastEthernet0/0
D        10.6.0.0/21 [90/156160] via 192.168.12.2, 00:00:08, FastEthernet0/0
C        10.10.10.10/32 is directly connected, Loopback10

I have this configuration below:
router eigrp 1
 distribute-list route-map FILTER_IN in 
ip access-list standard NET_1
 deny   10.0.0.0 0.0.255.255
route-map FILTER_IN permit 10
 match ip address NET_1

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Now if I run sh…
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When I add a debug to a 4500 switch at new work place, “show log” is failing to display my debug. Which logging command gets that going?
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I have EIGRP routes advertised from R1 to R2 as shown below:

R2#sh ip route eigrp 1      


      10.0.0.0/8 is variably subnetted, 13 subnets, 7 masks
D        10.10.10.10/32 
           [90/156160] via 192.168.12.1, 00:00:09, FastEthernet0/0
      20.0.0.0/32 is subnetted, 1 subnets
D        20.20.20.20 [90/156160] via 192.168.12.1, 00:00:09, FastEthernet0/0
      172.16.0.0/16 is variably subnetted, 5 subnets, 3 masks
D        172.16.0.0/24 [90/156160] via 192.168.12.1, 00:00:09, FastEthernet0/0
D        172.16.2.0/24 [90/156160] via 192.168.12.1, 00:00:09, FastEthernet0/0
D        172.16.3.0/24 [90/156160] via 192.168.12.1, 00:00:09, FastEthernet0/0
D        172.16.12.0/22 
           [90/156160] via 192.168.12.1, 00:00:09, FastEthernet0/0
D        172.16.22.0/26 
           [90/156160] via 192.168.12.1, 00:00:09, FastEthernet0/0
R2#

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on R1 I have configured route map and prefix list to block (filter out)network 172.16.0.0 /16 le 26,  but it does not seem to work

route-map FILTER_OUT deny 10
 match ip address prefix-list SMALL_PREFIXES
ip prefix-list SMALL_PREFIXES seq 10 permit 172.16.0.0/16 le 26

route-map FILTER_OUT permit 20

Open in new window


Any Help ?

thank you
0
From what I understand it is more common to use the B scheme when wiring a plug but just want to make sure before I dig into this. The cable will go up the wall, into a wall insert and then a new cable plugged from the insert to a laptop. The other end will plug directly to a port in a Linksys router. Later on I may install a second wall insert so instead of plugging directly into the router it would go wall insert and then router.

Does it matter if A or B is used unless you need a crossover? All home equipment.
0
I have 8 routers (1 Cisco Small Biz, 1 Netgear AC1600, 6 Engenius) that have all stopped working in the last 2 weeks.  Engenius is working on the issue and is well aware of the problem, but has no idea the cause.  Atleast on the Engenius the firmware has become corrupted and can be restored to old firmware versions like 1.3.0 (When 1.4.13 is the current).  The ISP is Spectrum in 7 of the 8, and Centurylink in the other.  The Engenius routers are ESR300, ESR350, and ESR600 models.  No Engenius Access points have been effected as of yet for me personally.  I would have to believe some vulnerability is responsible for this, and hoping someone may have an idea.
0
We were having a bad quality audio during a large conf. call (around 45 attendees) on Lync and customer thinks it is coming from lack of CoS configuration on LAN devices. Do switches (L2) also need to have a CoS Configuration? Is there an approved std. template for Lync Voice/Video ports etc. ?

Thanks;
1
Hi All

I have a couple of clients with SonicWALL TZ 300 routers, and am considering having them purchase SonicWALL’s Capture Advanced Threat Protection because it seems like a damn good idea! As I understand it, it's cloud based sandbox system.

Would appreciate hearing everyone's thoughts, concerns or experiences with the product or similar products.

Thank you!

Mark
0
I have  router R1 connected to router R2.
R1 has some loopbacks and the networks that the loopbacks are on, are advertised to EIGRP

R1 has some Networks(172.16.0.0 0.0.255.255) that I need to filter out, so that they do not end up in R2 routing table:
on R1 , I have created Route Map , but before even I specify anything in Access-List and make route map match the Access-list . I have found that the Network 172.16.0.0 has already  been filtered out from R2 routing table... I wonder what has filtered it out .



R2(config)#do sh ip route | inc 172.16
R2(config)#

you see there is nothing about 172.16.0.0  in R2
Thanks



R1(config-route-map)#    do sh ip interface br
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            192.168.12.1    YES NVRAM  up                    up      
FastEthernet0/1            unassigned      YES NVRAM  administratively down down    
FastEthernet1/0            unassigned      YES NVRAM  administratively down down    
FastEthernet1/1            unassigned      YES NVRAM  administratively down down    
Loopback0                  172.16.0.1      YES manual up                    up      
Loopback1                  172.16.2.1      YES manual up                    up      
Loopback2                  172.16.3.1      YES manual up                    up      
R1(config-route-map)#

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R1(config-route-map)#do sh run
Building configuration...

Current 

Open in new window

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I have a Sonicwall NSA 3600. I have a block of Public IP's.  I have a Server 2012 vm with two IIS sites and two seperate LAN IP's configured in bindings.  One of the IIS sites has been configurd in the NSA via the wizard. The Address Object is called "web1."  

When trying to run the web server wizard for the second IIS site, i get error "Server name conflicts with existing address object" when entering the same name of "web1" which is the servers DNS name.  I change the name to "web2" and assign my LAN IP and my seperate WAN IP and it completes the wizard and creates rules.  

However, my site is not available at all. Not even by WAN.  I ensure i configure private and public DNS but it wont resolve.

Has anyone seen this issue when running to web sites from one server trying to create the firewall rules in an Sonicwall.
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Hi all I have a site to site VPN connected via two Cisco routers, the tunnels are up but there is only one-way traffic.

Can you please take a look at my configs to see if there's anything I have missed?

(Show crypto isakmp sa) The tunnel is up (QM_IDLE) after attempting a ping to the other side.

(show crypto ipsec sa)
Traffic from SITE A shows getting encapsulated and decapsulated at the other side but nothing returns.
Traffic from SITE B shows getting encapsulated and then nothing on the other side.

I have a feeling whatever is providing the connectivity to SITE Bs WAN port is blocking my traffic but before I start pointing fingers I would like to be sure.

Thanks in advance.
SITE_A.txt
SITE_B.txt
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Hi all, please am trying to login to cisco FEX from a switch, but not cleared how to go about it.

I have attached the FEX status on the switch below

If i login to the switch what command do i applied that will let me see all interfaces on the FEX.

Thanks for looking into this for me.
FEX-status.docx
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Hello,

I need to set up 2 routers in same network that are connected to 2 different internet providers, 1 of the PCs should get internet only from router A and the other PC should get internet from router B, both PC need to use same printer on the network and to be able to share files between them. What's the best way to configure this kind of network?

Thanks.
0
Hello,
My wife is getting a work from home job that requires a wired network cable connection to her laptop and her office is on the other side of the house where the cable modem is located. Lucky for me we have a basement with easy access to the underfloor where the room is located.

I am planning on adding a wall jack near the cable modem and wiring it and running it up through the wall where her desk is located and wiring the other end into a jack that will be installed on that wall. Then a patch cable with two RJ45 connectors from the wall jack to a port in the router.

Question: Does it make any sense to use CAT 6 cable when my router is only gig speeds, I may get a faster router some day but there is no need for more than gig local speeds. It doesn't make any difference as far as internet speed since we only get 100 mbps internet speeds. Even considering that is there any future reason we would want CAT 6 speeds?

Question: Is there anything wrong with a Lowes or Home Depot type installation kit with crimpers and connectors, wires etc.? Not for a business office but it does need to be reliable.

Question: With CAT5e or CAT6 do I need to be careful what the wire comes in contact with? I think I have a pretty clean shot but it may need to cross over metal duct work unless that will cause a issue. If metal duct work will be a problem is there a conduit I can run it through that will shield it from any problems? or is there a certain distance to keep it away …
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I've got a reply by ISP, which I, in all honesty, do no understand.

They told me they allocated a:

"block of public address 123.123.123.123/30" - what does that mean?

Also what is VIP DGW?

thanks
0
We have ten gigabit interfaces. How much tunneled traffic would the device be able to push?
0
I am trying to understand the purpose of the number that comes after the "/".
example:
ip prefix-list TEST seq 5 permit 10.0.0.0/2 ge 17

2 means match 2 bits of first octet 10

however whatever I put , the prefix list will care just about the ge 17

to clarify it I have this table before filtering:

R1(config)#do sh ip route 
      10.0.0.0/8 is variably subnetted, 6 subnets, 6 masks
D        10.1.0.0/16 [90/156160] via 192.168.12.2, 00:00:01, FastEthernet0/0
D        10.2.0.0/17 [90/156160] via 192.168.12.2, 00:00:01, FastEthernet0/0
D        10.3.0.0/18 [90/156160] via 192.168.12.2, 00:00:01, FastEthernet0/0
D        10.4.0.0/19 [90/156160] via 192.168.12.2, 00:00:01, FastEthernet0/0
D        10.5.0.0/20 [90/156160] via 192.168.12.2, 00:00:01, FastEthernet0/0
D        10.6.0.0/21 [90/156160] via 192.168.12.2, 00:00:01, FastEthernet0/0

Open in new window


if I use : ip prefix-list TEST seq 5 permit 10.0.0.0/2 ge 17
router eigrp 1
 distribute-list prefix TEST in


R1(config)#do sh ip route

      10.0.0.0/8 is variably subnetted, 5 subnets, 5 masks
D        10.2.0.0/17 [90/156160] via 192.168.12.2, 00:00:03, FastEthernet0/0
D        10.3.0.0/18 [90/156160] via 192.168.12.2, 00:00:03, FastEthernet0/0
D        10.4.0.0/19 [90/156160] via 192.168.12.2, 00:00:03, FastEthernet0/0
D        10.5.0.0/20 [90/156160] via 192.168.12.2, 00:00:03, FastEthernet0/0
D        10.6.0.0/21 [90/156160] via 192.168.12.2, 00:00:03, FastEthernet0/0

Open in new window


so what 's the purpose of the number that comes after the slash sign "/", example:10.0.0.0/2

Thank you
0
Network
In the topology above , I have EIGRP configured on both routers.
I have advertised all the networks to EIGRP

these are the interfaces in R2:
R2(config-router)# do show ip interface bri
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            192.168.12.2    YES manual up                    up      
FastEthernet0/1            unassigned      YES unset  administratively down down    
FastEthernet1/0            unassigned      YES unset  administratively down down    
FastEthernet1/1            unassigned      YES unset  administratively down down    
Loopback0                  172.16.0.2      YES manual up                    up      
Loopback1                  172.16.1.2      YES manual up                    up      
Loopback2                  172.16.2.2      YES manual up                    up      
Loopback3                  172.16.3.2      YES manual up                    up      
R2(config-router)#

Open in new window


in R2 , when I advertise R2(config-router)#network 172.16.0.0 0.0.3.255
I do not get any error, and all 172.x.x.x networks will show up in R1 routing table:

R1#sh ip route  eigrp 

Gateway of last resort is not set

      172.16.0.0/24 is subnetted, 4 subnets
D        172.16.0.0 [90/156160] via 192.168.12.2, 00:02:02, FastEthernet0/0
D        172.16.1.0 [90/156160] via 192.168.12.2, 00:02:02, FastEthernet0/0
D        172.16.2.0 [90/156160] via 192.168.12.2, 00:02:02, FastEthernet0/0
D        172.16.3.0 [90/156160] via 192.168.12.2, 00:02:02, FastEthernet0/0
R1#

Open in new window


but if I try different wild card mask I get error  :
R2(config-router)#network 172.16.0.0 0.0.4.255
%EIGRP: Invalid mask (discontiguous)

but if I try these wild card masks one a time after Negating one of them , it will work:
R2(config-router)#network 172.16.0.0 0.0.1.255
R2(config-router)#network 172.16.0.0 0.0.0.255  

***So the ones that worked (one a time) are:
R2(config-router)#network 172.16.0.0 0.0.1.255
R2(config-router)#network 172.16.0.0 0.0.0.255  
R2(config-router)#network 172.16.0.0 0.0.3.255

the :172.16.0.0 0.0.2.255 ,172.16.0.0 0.0.4.255,172.16.0.0 0.0.5.255........172.16.0.0 0.0.254.255

I get this error :%EIGRP: Invalid mask (discontiguous)

Any idea why  ?

Thank you
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Hello guys,

I´m trying to setup SSTP server on a mikrotik router for multiple multiple.

Is it somehow possible to determinate which SSTP server profile should be used based on Domain?

Example:
I have two domains exmple1.com and example2.com
when some user connects to SSTP server from domain exmaple1 use this SSTP profile when user connects from example2 use another profile.

Any ideas?

Thank you very much!

Regards

Jiri
0
How to clear bgp if peers had exceeded the maximum number of prefixes configure and how to show maximum prefixes in cisco
0
hi, I need to find when user loging to our web site, which address or which zip/postcode, is there is a way to do that?
Other than find broadband service provider location.
Any tools may be i can buy more help full.Thanks
0
Dear Experts,

Need an advise on BGP along with traffic engineering. We have a simple setup with two ISP links and we have done a simple BGP peering using eBGP with both the ISP's so that if one fails the other one takes over.

Now my question we need to do a further BGP peering with one of a customer who would need us to allocate few subnets and want to publish their subnet via peering. Also we have a new requirement of controlling the bandwidth allocated by per subnet or per IP address and also meter the data consumption.

What is the best way to achieve this? Any overall architecture recommendation along with hardware we might need for this. We also have the requirement to do any changes without any downtime.

Thank you in advance
Best Regards
0
I have 2 routers  R1 directly connected to R2. R1 has a loopback interface with ip address 1.1.1.1/32
However in EIGRP when I advertised the loopback network  I used:
router eigrp 1
 network 1.1.1.0 0.0.0.255

Now if I go to R2 routing table I see that route showing as:
R2#sh ip route eigrp
Gateway of last resort is not set

      1.0.0.0/32 is subnetted, 1 subnets
D        1.1.1.1 [90/156160] via 192.168.12.1, 00:06:20, FastEthernet0/0

***I thought it would show as /24 instead 32

Any idea ?

Thank you
0
Any Experts to explain the meaning of Default Networks in the routing tables below:

I see "*"  next to C* and D*
what does that mean ?

Thank you

R2#sh ip route connected 
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

      192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.12.0/24 is directly connected, FastEthernet1/0
L        192.168.12.2/32 is directly connected, FastEthernet1/0
 *    192.168.23.0/24 is variably subnetted, 2 subnets, 2 masks
C*       192.168.23.0/24 is directly connected, FastEthernet0/0
L        192.168.23.2/32 is directly connected, FastEthernet0/0
R2#

Open in new window


R1#sh ip route eigrp
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

D*    192.168.23.0/24 [90/30720] via 192.168.12.2, 00:01:47, FastEthernet0/0
R1#

Open in new window

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.