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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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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

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Any Help ?

thank you
0
Free Tool: Site Down Detector
LVL 11
Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

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
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

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 …
0
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
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)#

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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#

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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
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
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
Important Lessons on Recovering from Petya
LVL 11
Important Lessons on Recovering from Petya

In their most recent webinar, Skyport Systems explores ways to isolate and protect critical databases to keep the core of your company safe from harm.

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#

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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
I currently have and run Cisco RV130W. I have purchased A RV340W to replace it. My question is am I able to backup the configuration form the current router and then upload it to the new router? Are there any pitfalls, suggestions, etc? Thank you in advamce
0
eiI configured EIGRP in R1 and R2 , but for some reason I cannot ping from R1 to 192.168.23.3, even though there is an EIGRP route in R1 for 192.168.23.0

1#sh run | sec eigrp
router eigrp 1
 network 192.168.12.0
R1#

Open in new window


router eigrp 1
 network 0.0.0.0
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0

Open in new window



R1#sh ip route eigrp

D*    0.0.0.0/0 [90/30720] via 192.168.12.2, 00:06:03, FastEthernet0/0
D     192.168.23.0/24 [90/30720] via 192.168.12.2, 00:06:03, FastEthernet0/0
R1#

Open in new window


I cannot ping  R3 from R1



R1#ping 192.168.23.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.23.3, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R1#

FRom R2 I can ping:
R2#ping 192.168.23.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.23.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/19/24 ms
R2#
Screen-Shot-2017-11-09-at-8.38.50-PM.png
0
Does anyone know anything about these? I just got a new client that has one of these in place and before I recommend upgrading I wanted to do some home work.
0
A company I am supporting has a SonicWALL TZ600 firewall.

We need to audit and determine how much internet bandwidth each user is using and what type of bandwidth is being used (for streaming video, streaming audio, file downloads, etc.)

How can this be setup within the SonicWALL TZ600 firewall?
0
Hi Guys,

I had to switch our two WAN Interfaces on SonicWALL, (Thus X1 & X2)

1.  I switched the public IP configuration under Interface Settings
2.  and changed all the NAT policies, switching X1 & X2 for all rules


My questions,

a.  Is there any other rule(s) that need to be changed to switch primary internet access for LAN users between X1 & X2?

b.  I've noticed that some NAT rules refer to an "address object" rather than the interface (X1/X2) directly.  
These I did not change as the object's public address was still correct.  Is there a difference in referring to the interface (X1/X2) directly, or using an object instead?  
In my case, where I had to switch X1 & X2 ... the rules with objects made things a bit easier as it stayed the same.  Is this the only difference using an object or referencing to the interface directly?
0
In the example blow - Juniper firewall has heard from two WAN routers of a default route via OSPF.
It seems basically happenchance that 13.79.23.63 is the preferred default route. What could I do on the juniper to make 13.79.23.63 to always and purposely be chosen over the .62?

myjuniper> show route
0.0.0.0/0          *[OSPF/150] 1w6d 16:05:01, metric 26, tag 0
                      to 13.79.23.62 via reth0.0
                    > to 13.79.23.63 via reth0.0
0
Need to connect cable modem to 8-port POE switch but neither has DHCP Service, necessitating the possible need for a router. Need simple Plug&Play P&P.  Do not need WIFI, since this will be remotely located and wired to POE switch.  Effectively, I need a router w one WAN and one LAN port and with DHCP service.  This goes in a 24" high structured wiring panel.  The switch is a Netgear GS108PE 8-port POE Gigabit Smart Managed Plus Switch.
0
ISP making a demark  drop inside my new server room.   I don't want to find out last minute there's no signal or lower bandwidth than ordered.
Is there a reasonably inexpensive device that can show the signal and can test speed?  Or any other ways?
 This is for LC Fibre 1Gb multimode.  Thanks.
0
Keep up with what's happening at Experts Exchange!
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Keep up with what's happening at Experts Exchange!

Sign up to receive Decoded, a new monthly digest with product updates, feature release info, continuing education opportunities, and more.

Greetings.

I am trying to setup static routing and need some assistance please. I have two routers that talk to each other but I need them to talk to an additional router on a different network. Here is what I have. Router 1 and router 2 are a cisco 1841 and the other is an asus

Router1
FE0 172.46.23.1       255.255.255.192

I typed in "ip route 0.0.0.0 0.0.0.0 10.0.3.0"
I checked the routing table using sh ip route and I do not see nothing about 10.0.3.0 network.

ROUTER 2
FE0 172.16.46.       255.255.255.192


I typed in "ip route 0.0.0.0 0.0.0.0 10.0.3.0"
I checked the routing table using sh ip route and I do not see nothing about 10.0.3.0 network.
HERE is a 3rd router which is a SOHO router
internal 10.0.3.1

so I have configured static routing on the first router with the following.

10.0.3.1 and have forwarding setup on the router

i setup static interface for the asus router also
0
EIGRP Lab example for Query Scoping.

I have read about EIGRP Scoping , and in most of articles they recommend Summarization at the Edge router. I have tried that, and enabled Debug EIGRP Packets Query on other routers, and shut down interface on one of the routers behind the Edge router, but I still saw a Query sent by the Edge Router to other routers.

I am not sure if that's normal behaviour or the lab is not the right set up to test EIGRP Query Scoping.

Any Lab Example from EIGRP Expert that demonstartes EIGRP Query Scoping might  help understand this topic..

Thank you
0
When does EIGRP Equal Load-Balancing happen

I have managed to Test Unequal load-balancing using Traceroute multiple times and quickly.

However for Equal Cost , I tried Traceroute multiple times and quickly , but it keeps going through one path..

I am not sure now if Equal Cost Load-balancing happens only when there is congestion on one path...if so why this does not happen on Unequal Cost..

Any Clarification will be very much appreciated.

Thank you
0
This is a question about Internet outage at a client today.  Up front:

1. I decided to ask a question instead of writing an article: My choice.
2. I rated it high priority even though I know the answer to provide incentive for experts to answer.
3. I do not want and will not accept Googled answers. I already know how to use Google. Use only your own words, skill, knowledge and experience.
4. I could not find a solution here but that does not mean there isn't one.
5. I will select the first two best answers: 1,500 points each.

Background. My client downtown for which I do the Financial Consulting work. I went there this morning and Internet was just fine from 8:00 am to about noon when it went "thud" and was gone. Normally that is external, I hooked up my Rocket Stick to finish a few things, and asked the Office Administrator if she had called the ISP. She was on the phone to them. Everyone has no internet so no (hosted Exchange) Outlook email, but servers and printers are running.

Hookup:  ISP modem, business internet, 6 static IP addresses allocated. At this point, one IP for office, one IP for Wireless Guest access (no access to serverss or network), and one IP for wireless POS solution for our ticketing system.

The modem is attached to an ISP Cisco 891 (?) box, which lashup is to provide high speed internet to the office. Hooked to this is a Juniper Netscreen VPN router / firewall. Hooked to the Juniper are a couple of HP Switches to …
0
I have an issue on a site with bridge mode so need to change to routing mode. The router works perfect on its own but when put into bridge mode with a SonicWALL there are drops every few minutes. I  want to change the setup to routing mode so both the router and firewall will both have internet IP's

Lets say ISP supplied IP's are

213.94.227.208
213.94227.209

I configure my router to a dynamic IP which means I should get the 208 address
I turn off DHCP, Firewall and NAT and set the Lan interface of the router also as the 208
I then configure my firewall to be 209 on the Wan interface with a gateway address of 208. I connect a cable from the WAN port of the SonicWALL to the lan port of the router
I should now be able to access the internet via the Lan side of the firewall..

Correct?
0
I have cisco 3650-48FQ-S that has 4 sfp+ ports. I have 3504 Cisco WLC with one 10G RJ-45 port. Do 10GBase-T sfp+ copper Transceiver works/compatible with 3650 sfp+ port to connect to 3504 10Gig RJ-45 copper port? What is the part# to buy?
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.