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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Hi One switch 3560 is connected to 4500 through two interfaces, which are bound as port-channel and as layer 2. Under the 3560, there are some PC and ip phone. so we use auto qos at each interface of 3560. Now we also need to configure auto qos voice trust on the port-channel. but 3560 port-channel does not support auto qos. How can we resolve the issue? Thank you
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how to Enable SIP ALG on a Velop router system.
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I would like to setup a sonicwall tz600 at home to use failover and load balancing.  At present, we have a linksys ea9500 router with linksys velop in bridge mode for wi-fi and a motorola doscis 3.1 modem connected to cox.  we are looking at adding at&t fiber internet as a secondary (maybe) source as the cox service has been spotty.  i have a sonicwall tz600 that we used to use at office and have since replaced it with something else.  It still has its access to antivirus, etc.  Is what I want to do possible and if so, how would I go about accomplishing it? Is the Sonicwall tz600 good for this or would I be better off with something else.  Thank you for your assistance.
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ARP and Proxy-ARP

I have been reading about ARP and Proxy-ARP , but could not get a good grasp of it.
If I understand when there is Layer3  between 2 hosts in different subnets, the router will take care of ARP Requests/Replies between the Hosts.
in some articles they call that Proxy-ARP when the L3 device is handling the ARP Request/Reply.
if that's true , then ARP is within the same subnet and Proxy-ARP between 2 subnets connected by L3 device ?

Thank you
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How Vmware Untagged Traffic is handled by Cisco switch

Sometimes in Vmware VM Port groups are not assigned to any Vlan or they have VLAN0, when the VM traffic gets to Cisco Switch how does the switch knows to where to send it.
Assuming VM1 is trying to communicate with VM2 and both are in default VLAN0

Thank you
0
Hello,

   I wanted to get some opinion on what device would be better suited to be deployed at the edge of a site between an ASR or Nexus 7700? Specifically this device will be connecting to about 650 remote sites primarily doing routing. From a performance, and port capacity perspective what would be the best device to deploy?  Thank you
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IP NAT Destination

Can someone give me an example  where we need to use Destination option in NAT

Example: IP NAT Inside/Outside Destination...

Thank you
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Cisco site to site bridge.  

I have a remote site that has a Cisco 867VAE on ADSL and I can telnet to it.  They use it for internet access.  

I have a Cisco 2851 at my site (and a shelf full of other ethernet and DSL routers in case this one is not adequate) providing ethernet access for my site.  

I need to access a device at the remote site (preferably without taking down Internet Access for more than a few minutes).  This device does not have a gateway configured, so I can't simply portforward to it or configure a site to site gre tunnel (as either would require a gateway or route on the device in question)

SO I decided to do a transparent bridge.

All the examples I can find say that a router can either route or bridge, but not both.  I don't believe that this is a real limitation.  After thinking about it, I want to set up a sub interface on the destination router that will bridge to a router at my site.  Presumably, this will involve creating a site to site VPN and attaching it to a bridge group.  

Can someone please help me achieve my goal - either using the method I have described - or a totally different method.  

I have remote access to configure the remote router.  I have no access to the device in question.  Physical access to the device or remote site is not possible.  There are no computers at the remote site that I can say, TeamViewer to and then connect locally to the device.  

thanks

John
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I am looking to purchase Firewall. Anti-malware router.  It's for my small business of currently about: 30 people but will grow up to 100 units within the next 1-2 years.

The problem is we had a ransomware attack couple of days back and it's made us more aware.

The other thing to take note is: We don't have in house IT professionals, so we hire professionals from all over the world to work on our servers, they sometimes use RDP to login. or team viewer.

We use a VM ware, specifically promox, so we considering using: nakivo for back up also.

Our ISP guy recommended we used: Mikrotik RB/1100AHX2 Routerboard RouterOS Level 6 but he thinks we are small for it, and I think there's something better already.

I want to invest for the next 5years. I want to buy something that will take us to the next level, yet keep us funtional.

I don't know if we can also use it to block certain sites, manage bandwidth for users in the office, anything that'll generally keep security really up above board. Thank you.
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Hai Guys

We have one Dell switch S4148T and its have four 100GBE and two  40 GBe  SFP+ port.  Same like we have one dell chassis M100E.  It have two dell force10 MXL 10/40 GBE balde switch. we connect the cable from S4148T to force10 MXL blade switch and do the initial configuration. But still swicth ports are down ( both 100GBe and 40 GBe) . Any one can help me to resolve this issue. Can you share the configuration with me
1
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Dear Experts,
 
I have a following setup:
 
[list]Home LAN connected to the Internet on 10.0.0.0[/list]
[list]Lab/Test LANs on 192.168.30.x & 192.168.40.x[/list]
[list]VMnet3 for .30 and VMnet4 for .40[/list]
 
I would like some of the machines in the Lab/Test LANs to access the Internet, so I'd tried to setup a router.. without having any success so far
 
Router (RHEL6.9):
eth0 = 10.0.0.100/24, GW: 10.0.0.1
eth1 = 192.168.30.254/24
eth2 = 192.168.40.254/24
 
#netstat -nr
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
10.0.0.0        0.0.0.0         255.255.255.0   U         0 0          0 eth0
192.168.30.0    0.0.0.0         255.255.255.0   U         0 0          0 eth1
192.168.40.0    0.0.0.0         255.255.255.0   U         0 0          0 eth2
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth1
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 eth2
0.0.0.0         10.0.0.1        0.0.0.0         UG        0 0          0 eth0
 
Desktop on .30 (also RHEL6.9)
eth0 = 192.168.30.16/24, GW: 192.168.30.254
 
#netstat -nr
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.30.0    0.0.0.0         255.255.255.0   U         0 0          0 eth0
0.0.0.0         192.168.30.254  0.0.0.0         UG        0 0          0 eth0
 
I can ping the GW at …
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I have two networks in one closet for a small shared office. there are two internet connections going to WiFi. There is one copier that the two offices want to share. I need to know the best way for the two networks to share the printer but keep the networks separate. Could I connect a L2 router to the two current wifi routers and direct traffic that way?
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Does Topology Change have impacts on the Network

I would llike to know when there is TCN in the Network whether this can impact End Users and Servers.

The reason for this question, is I believe that Switches do not perform in a timely manner, they can have delays because of CPU or Memory over usage..
So I wonder if TCN is normal behaviour or it can cause disruption in the network

Thank you
0
MST Revision number usage

I would like to know what is the usage of MST Revision number ?

Thank you
0
Selling my networking lab equipment, but where do I sell for the most $$$ and least fee's?
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I cannot telnet to idrive servers 148.66.224.40 on port 443. As a result the remote backup quit working. I can telnet to on other client networks. We have a Cisco ASA 5506. Im using ADSM to try and figure this out. I have uninstalled antivirus, disabled pc firewall etc. Below is a screenshot of the rule I created to try and fix this.

I have another network that has no firewall and is wide open for testing, and I cannot telnet to it on that one either. ISP says they are not blocking that address.

Windows Server 2012
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How can I find the up address of the DSL modem behind a router?  
Attaching the DSL modem directly to a computer did not help:
The ipconfig showed a 169 up address.
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Trying to get VRF forwarding on an interface in Cisco IOS 15.4.  We currently have a router with 15.2 and have no trouble with it:

interface FastEthernet0/0/3
 switchport access vlan 3
 ip vrf forwarding INTERNAL
 no ip address


But when I try to configure this on the 15.4 router, I get an error:

Test(config)#int f0/1/3
Test(config-if)#ip vrf forwarding INTERNAL
                   ^
% Invalid input detected at '^' marker.

Test(config-if)#


IP vrf isn't an option:
Test(config-if)#ip ?
Interface IP configuration subcommands:
  address     Set the IP address of an interface
  admission   Apply Network Admission Control
  auth-proxy  Apply authentication proxy
  ddns        Configure dynamic DNS
  device      IP device tracking
  dhcp        Configure DHCP parameters for this interface
  igmp        IGMP interface commands
  rsvp        RSVP Interface Commands

Test(config-if)#ip



I do have vrf configured in the global:

ip vrf INTERNAL
 description Trusted Network
 rd xxxxx:10
!
ip vrf INTERNET
 description Internet Traffic
 rd xxxxx:20
 inter-as-hybrid


Any ideas what I'm missing here?
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Hi Please see the below config, are these four commands making sense? Can we use one command to replace the four command? Thank you

R1(config)#do sh run | i snmp
snmp-server community abc1 RO 1
snmp-server community abc2 RO 2
snmp-server community abc3 RO SNMP-RO
snmp-server community abc4 RO SNMP-RW
0
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Hi,

I have a TP-Link 3150 v2 wireless ac router.

Does it support access point and repeater mode?

If not, please suggest some wireless ac routers that act/support in Repeater and access point mode.

Reach out to me for any questions.

Thanks for your support.

Warm Regards,
Sriram K
Senior Technical Writer.
0
Hello,
I have open vpn server and all client work fine
I have also setup a new open vpn client config on it and its connect to the other servers.
I want when the client request a specific ip to route through vpn client connection that is established on server
so what I have to do in this case.
thanks.
0
Hello,

If I am running a tcp ping tool on a virtual windows server that is hosting my website also, would it be possible to use the tcp ping tool to ping the visitor of my website to record the latency/round trip time without the stateful firewall blocking it?

The issues I came up with would be that all/most home-based firewalls are stateful firewalls, tcp communication can use only one IP and one port(if I am correct?) per application (website in this scenario). So I would have to have the tcp ping application listen in on the port using another IP, or open a new port (and IP) to communicate with the same website user. So my second question would be: would the stateful firewall block this communication since it is from a different port and/or IP even though it's on the same web server?
0
Recently we receive one project, we found that that is unusual network setup because the given the router TP-Link AC1200. Usually we are using MSR930 or Cisco Router as WAN router so that we can use the Public LAN IP given by ISP in our network (Scenario 1).
To overcome this issue, we are connecting the ONT to our Firewall WAN port directly and now we are thinking how to use the public LAN IP for our devices. Someone is said we can create VLAN or secondary IP, but I don’t have any experience for this setup
I hope that some expert can advise which is correct option and how-to setup in our SonicWALL TZ600.Thanks
Case-Study.pdf
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I am having issues in a MPLS VPNv4 BGP setup where the CE is not receiving any BGP routes from the PE.

PE2 Cisco BGP config:
router bgp 1
 bgp log-neighbor-changes
 neighbor 1.1.1.1 remote-as 1
 neighbor 1.1.1.1 update-source Loopback0
 !
 address-family vpnv4
  neighbor 1.1.1.1 activate
  neighbor 1.1.1.1 send-community both
 exit-address-family
 !
 address-family ipv4 vrf CUST-1
  neighbor 10.10.20.2 remote-as 200
  neighbor 10.10.20.2 activate
 exit-address-family
!

CE2 Cisco BGP config:
router bgp 200
 bgp log-neighbor-changes
 redistribute connected
 neighbor 10.10.20.1 remote-as 1
 neighbor 10.10.20.1 soft-reconfiguration inbound
!

If you need more info please let me know (I can attach the full config if you want).
CE2_startup-config.cfg
PE2_startup-config.cfg
0
Dear Experts, we are planning to test the electricity in the next few days, so at that time there is no any power, even from the Generators.

So we are going to turn off our system at night and turn it on in the next morning, but how are the proper procedures?

We have:
1.Physical Cisco routers and switches, NAS storage
2.Physical IBM servers
3.Physical Sonicwall firewall
4.Physical ESXi hosts HPE Gen9
5.Physical HPE 8/8 Base 8-port Enabled SAN Switch AM867C, SAN storage HPE MSA2040

For #1,2,3 we can save the running configuration and shutdown without any problem, but #4 and #5

We got this plan from the Internet and it is quite understandable. Should we consider something else?

The order you will need to shute down is: 
    Shut down the VMs
    Place the hosts in MAintenance mode
    Shut down the hosts
    Shut down vCenter (if vCenter is a vm you will need to connect to each host seperately and shut it down.)

To bring everything back up
    Start the hosts
    Start vCenter

Open in new window


However, for SAN switch and SAN storage, we could not find the save config button anywhere. So could you please suggest the plan?

Many thanks as always!
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.