A tag for questions pertaining to network routers, devices that forward data packets between computer networks, commonly at the network layer (layer 3) of the OSI model.
-1
votes
0answers
30 views
Tenda N3 Router problem [closed]
The problem started 3 days ago ,when i connect internet via Ethernet cable it works at the usual speed 2.1 Mbps but when i connect it via WiFi it works very slow i have tried upgrading the ...
12
votes
3answers
219 views
Backing up Cisco router configuration - including ssh keys
We have some Cisco 2821, 2921 and 1921 routers in our shop. I can back up and restore the configurations by copying out or in the startup-config file, but what about the keys for ssh? I don't want ...
0
votes
1answer
52 views
How to connect to internet with Router DHCP disabled [closed]
I have a Motorola wimax router , I was experimenting with setting and switched off the DHCP from its web interface http://192.168.15.1 . Now I am unable to use internet. Please advise me how I should ...
4
votes
2answers
57 views
forwarding / non forwarding Route Reflector?
I am considering running route reflectors in our current network topology of 20 od MX80's however all current devices are active traffic forwarders.
from a scaling perspective RR makes logical sense ...
1
vote
0answers
55 views
Pass DHCP / multicast traffic for IPTV through Cisco 887VA-M to the decoder
I'm trying to setup a Cisco router at home. The VDSL connection to the internet is working. Another subinterface on the Uplink is foreseen for IPTV, but I don't know how to bridge it the right way to ...
-2
votes
0answers
81 views
Connecting two PCs through router [closed]
I have an embedded system acting as a router (I'll call it the router). The router has two network interface with following settings
interface 0: IP address 10.0.0.2, subnetmask 255.255.240.0
...
7
votes
3answers
94 views
how to get scp via snmp to work with cisco routers?
I have a lab setup where I'm trying to use SCP via SNMP to a cisco router.I found some online documentation such as: http://ccie20728.wordpress.com/2008/05/20/get-the-cisco-configuration-over-snmp/
...
4
votes
1answer
66 views
ip-fwd-entry allocation fail OSPF
Any idea what this error means? I can't find much on googling. Device is a Brocade SX. Output is from: show ip ospf error
**** Warning! ip-fwd-entry allocation fail 3629337 times
--- The ...
-2
votes
1answer
53 views
Belkin Router not able to connect to the net [closed]
My ISP uses PPPoE and when I use my laptop with a user name and password I am able to connect to the network cable which is a RJ-45.
However when I try to use Belkin F5D7234-4 G router, it does not ...
7
votes
2answers
91 views
Determining optimal bandwidth needs for the office
We're currently using the Cisco 1921/K9 router along with SG300 L3 switch and other L2 switches in the office environment. We're hooked up to a 10M fiber line for internet but not sure if we need that ...
6
votes
4answers
166 views
Redundancy between router and servers
In the past, I was using a NetGear GS724T between my router and my servers. Unfortunatly the switch suddenly died.
Now I've changed it for a GS748T and also bought one more and I am wondering how I ...
2
votes
3answers
151 views
Is a router always necessary to link two subnets?
I am thinking especially of VLANs, which represent separate subnets that may need only one switch.
8
votes
3answers
88 views
How does one specify certain IPs or MAC addresses for NBAR policy enforcement?
In an office environment, if I wanted to block youtube using a Cisco ISR router, I would set up the following with NBAR:
class-map match-all YOUTUBE
match protocol http host "*youtube.com*"
!
...
6
votes
3answers
86 views
Setting up DHCP server on the router or on the switch?
We're using the Cisco 1921/K9 with a SG300 L3 switch. Does one set up DHCP server on the router or on the SG300? If both is capable, what is the reason to choose one over the other?
Note: I have 4 ...
-2
votes
0answers
43 views
Weird Website Connect Problem [closed]
I manage three websites for my boss and work from her office. For some reason, those three websites keep giving me an error when I'm in the office, but nowhere else. It will get really slow and then ...
7
votes
1answer
102 views
Cisco IOS built-in SSH client default version
You issue the command ssh 192.168.97.97 from a IOS device and the destination IOS router/switch SSH server is accepting both SSH versions. Being that you did not specify a version to use on the SSH ...
5
votes
3answers
126 views
ISR routers - difference between routed and switched ports
On a Cisco ISR router - would you say there are any benefits from purchasing an HWIC or EHWIC to connect to the next set of switches within the branch network?
For instance. Lets say Gig0/0 and ...
7
votes
4answers
279 views
Embedded routers vs. software routers in the datacentre
I've been looking for a new 'core' router to put in our new rack which is colo'd at a nearby datacentre. What I've come across is the usual Cisco/Juniper/Brocade lineup, with the usual unattractive ...
9
votes
2answers
303 views
RIP routing is broken between two routers
There are 2 routers connected something like this:
Network1 ----- (172.16.1.1/24) Router 1 (172.16.3.1/30) ------ (172.16.3.2/30) Router 2 ------ (172.16.2.1/24) Network 2
I try to add addresses ...
11
votes
2answers
129 views
Output Drops on Serial interface: Better queueing or Output queue size?
On Internet edge routers speaking eBGP to multiple carriers and iBGP to one another, all interfaces on the LAN and WAN side are GE except for one Serial full-DS3 (~45Mbps) on each router. Although I ...
3
votes
2answers
140 views
OSPF LSA Refresh Time
Is there a Cisco command that would allow one to modify the default value of 1800 seconds (30 min) for the OSPF LSA refresh rate?
1
vote
2answers
64 views
Regarding Home Network and Structured Network Panel [closed]
I have a question that maybe pretty simple for those who are little more adept at this. Recently, I've been wanting to get the Ethernet ports around my house (which was built last year) live. I have a ...
13
votes
5answers
300 views
Building new network and need 200+ wireless devices
I'm planning the network for my company's new office space. I'm not an expert so I'd like to present my plan and ask y'all nice folk to tell me if and where I'm making mistakes.
Assumptions:
...
3
votes
4answers
83 views
Cisco 2600 series router logging a lot of “Memory allocation failed” errors
We are getting the below two error messages randomly on a 2600 series router. Syslog shows the router has been fine up until a few days ago. Would a reboot most likely cure the issue or is it most ...
11
votes
1answer
242 views
What is the difference between a VRF and GRF? (cisco)
I've heard about VRF's and GRF's, but was is the difference between those 2? (cisco)
1
vote
1answer
37 views
How can I log authentication errors in 3G routers?
What command (debug) can I use to see authentication errors on a cisco 3G router specifically for the 3G connection?
7
votes
3answers
159 views
What is the use of a tunnel interface on a cisco router?
What is a tunnel interface used for on a cisco router?
What is the difference between setting up a VPN connection and a tunnel interface; or does this serve the same purpose?
-1
votes
0answers
55 views
What I got is Modem-Router combo.How may I use the router functionality alone in this device? [closed]
I bought a Belkin N300 Modem Router combo.It has 1 phone line jack and 4 LAN jack.I already had another modem from my ISP. I used to connect the LAN cable coming out of that modem to my machine ...
8
votes
6answers
135 views
DHCP relay problem on interfaces secondary network
A secondary network was configured on an interface of a Cisco 2621 router and the ip helper-address commands put in place but no clients of that secondary network could pull DHCP addresses. We swapped ...
1
vote
5answers
115 views
Is it common for rackmountable servers to have fibroptic input and output? or is it cat 5 and you have to convert after?
If the switching hub is in the floor above the server, I've heard its best to use fibre-optic cabling to avoid interference from unrelated electrical cabling in the ceiling for lights etc...
Is it ...
3
votes
3answers
66 views
Is it necessary to use layer 2 switches with microwave point-to-point links?
For a university project we are designing a network across 3 buildings for a small business. I've decided to implement a microwave point-to-point to connect each building.
A lot of microwave ...
1
vote
4answers
73 views
Cisco 1921 security features in the default bundle
Bought a Cisco 1921 router without any additional modules. This is the first time I'm using a non-home router. What security features should I enable so that users are relatively safe when using the ...
-5
votes
3answers
103 views
Need some standard configurations for Cisco 1900 series router [closed]
Just bought a Cisco 1921 router but I'm new to Cisco. Been having a hard time configuring it, what are some standard configurations for these? I have a L3 switch that will be connected to it and using ...
10
votes
7answers
595 views
How to connect 5 different networks together?
I have a network consisting of three servers in a data center, all of which are connected to each other via a switch.
In addition to this I need this network to access 4 additional networks, most of ...
7
votes
2answers
149 views
What is backpressure in the context of routers?
There are several references to backpressure as regards to the internal bandwidth and switching fabrics of routers and switches. What exactly does backpressure mean, and what are the real world ...
