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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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We use auto qos for voip at switch interface. After entering command "auto qos voip" we can see the generated commands. One of them is "service-policy output ...... " in this interface, but in other some case, it is service-policy input ...... " Why we can see these two different generated commands? Thank you
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Hi,

Any idea how to improve the network design to ensure the network performance , link redundancy (RSTP) and compatibility on layer 2 to layer 3 are working fine on  video management system?

Thanks

VMS_Diagram1.jpg
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I'm tearing my hair out on this one!

I've got a client who is having a VOIP issue (ongoing for several months).  Here are the facts:

1. Very small client: 4 users on a local domain, Windows PCs and a Server 2008R2.
2. VOIP phone system using same router as computer network.
3. Two phones work solidly.  Two are intermittent.  Tried varieties of plugging in phones, including directly into LAN ports on router instead of the network switch.
4. Intermittent symptoms are: 50% of the time a caller calls the number and gets either a fast busy signal, or "your call cannot be completed as dialed".  Sometimes the caller goes directly to voicemail even though the phone is not in use.
5. One of the phones has been replaced, as an experiment. Used to be a SNOM 320, now an Aastra model.
6. On the working phones, unplugging the phone on the network results in the caller getting voicemail.
7. On the intermittent phones, unplugging the phone typically results in the caller getting a fast busy signal (even at times when the phone seems to be working).
8. At a time when a phone was not working, I ran a continuous ping test to the phone from a computer on the LAN, and it never dropped out once.
9. Before the problems occurred, they enjoyed excellent service on this LAN hardware for some number of years.

The VOIP company is saying that the problem is either the switch or the router, though there are never any detectable problems on the network (there is a Windows 2008R2 server …
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Hi,

I have a PFsense router at my location and there has been some malicious activity coming from a device on my network.  Our ISP has notified us that they think that it's a problem with port 23 and if I block it that should fix the problem.  I've blocked port 23 outbound and inbound on all of the interfaces.  The complaint to our ISP gave a reference to BitNinja to check on the malicious requests sent from our network.  Here's a copy of the last request:

{
    "PORT HIT": "98.#.#.#:21349->185.#.#.164:8899",
    "MESSAGES": "Array
            (
                [01:36:54] => REMOTE HI_SRDK_DEV_GetHddInfo MCTP/1.0
            CSeq:57
            Accept:text/HDP
            Content-Type:text/HDP
            Func-Version:0x10
            Content-Length:15
            
            Segment-Num:0
            
            )
            "
}

I see that on 11/2/18, the malicious activity was on port 23.  Now, today I see that it's going on port 5680.  And the latest request was 8899.  

I don't know what device is doing this.  I've scanned the network and don't see any unknown devices on the network.  Here's something strange that happened.  There was a car in our parking lot with dark tinted windows and ghetto rims.  He was always gone when I came by the office.  I was talking to someone in the office and they said that that strange car was back.  I asked if they saw the driver.  She said that he was sitting in the back seat.  I remoted onto a computer in the office and scanned the network.  An IP address showed up that shouldn't be there.  I pinged it but it didn't respond.  …
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When dealing with MTU in a networking environment, how do you verify what MTU size is being used/generated from within two systems?  Also, can you explain or share the size of MTU of the default or best practice MTU size for communication on different networks and or devices?
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Hello there,

Can someone help me locate management packs for HPE Aruba Switches? Alternatively, easy to use documentation on how to incorporate its SNMP into SCOM (System Center Operations Manager) would be helpful too.
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Had an issue last week with upgrading a 4451 - X and Cisco recommended Image:  
isr4400-universalk9.16.03.07.SPA.bin

Was using image:  isr4400-universalk9.03.13.00.S.154-3.S-ext.SPA.bin

The Primary and secondary routers were stable for about 20 minutes and started to reload on their own.  The two engineers from Cisco were awful from the TAC Case we had open.

The Image I wanted to use was: isr4400-universalk9.03.13.10.S.154-3.S10-ext.SPA.bin

Anyone have knowledge of crashes on 4451-X using the Denali platform?  So far, I am unimpressed.
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Hello,
I want to create a hotspot system via mikrotik and log all users access to a log server …
the log server could be on the internet or I want to give me any solution that can  I use it to serve that for example rp
thanks.
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Hi

I have  a  CISCO 3750 switch  and would like to give a restart . Please post me commands  and dose it needs to be run from enable mode?

Thanks
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Bandwidth allocation - we are trying to increase our dburg bandwidth, currently its at 25%, we have class-default at 17%. Can we drop class default to 10% and increase dburg to 33%. Will it cause performance issues on our router? to better help we have a 500MB pipe

below is the router config




ip dhcp pool ccp-pool
 import all
 network 10.10.10.0 255.255.255.248
 default-router 10.10.10.1
!
!
ip domain name domain.com
ip name-server 8.8.8.8
ip cef
no ipv6 cef
multilink bundle-name authenticate
!
class-map match-any domain
 match access-group name VPN-TO-NY
class-map match-any VoIP
 match access-group name VoIP-NY
class-map match-any Broadcast-Video
 match ip dscp cs5
class-map match-any Outbound-Priority
 match access-group name VoIP-Bos
 match access-group name Polycom-Bos
 match access-group name TO-SFB
class-map match-any Bulk-Data
 match ip dscp af11  af12
class-map match-any Multimedia-Steaming
 match ip dscp af31
class-map match-any Interactive-Video
 match ip dscp cs4
 match access-group name Lync-out
class-map match-any Net-Control
 match ip dscp cs6
class-map match-any Multimedia-Conferencing
 match ip dscp af41
class-map match-any OAM
 match ip dscp cs2
class-map match-any Inbound-Priority
 match access-group name VoIP-NY
 match access-group name Polycom-NY
 match access-group name From-SFB
class-map match-any Transactional-Data
 match ip dscp af21
class-map match-any Voice
 match ip dscp ef
class-map …
0
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I am trying to allow systems to RDP into a system behind a ASUS wireless router model # RT-AC51U. I went to the WAN -> Virtual Server/Port Forwarding then added the Local IP, 3389 as the local port, and TCP as the protocol. I have the firewall on the ASUS router disabled. I have wireless disabled. I have both WAN and LAN IP addresses as static IP addresses with NAT enabled.


When I try to RDP into the system, which is allowing RDP, I can't access the system. I ran an NMAP scan on the ASUS router and it says that the only ports that are open are TCP 20, 21, 80, and 443. It doesn't show that TCP 3389 (RDP) is open.


Is there anything that I am missing?
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Hi,
I have a working WLC5508 which I want to replace with 2 WLC 3504 configured in HA.
I'm trying to figure out how to proceed with having the 30 AP now managed by WLC5508 move to new WLC3504. What is your suggestion ? Do I have to cope with a disruption window time ?
What about having APs survive in case of WLC3504 sudden death ? Is Flexconnect the answer to this ?

thanks
max
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hi,

need to make my fortiWifi-80CM to be wireless client to connect to my ipad personal Hotspot so that my internal network able to connect to internet.

can't settle wireless client screenshot
forit2.jpg

Error
forit1.jpg

Tks.
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I told a friend who needs to complete a point to point hardware VPN he needed to get a static IP address at both ends.  One end is his home, and so he calls AT&T uverse to have this done.

 They come out and make adjustments to the router which is a Pace.

Sometime after they leave he tells me he can't get his roku to work, and after calling AT&T they tell him he needs to assign it one of his new public IPs.  They did give his PC a static IP of 76.254.xxx.xxx.  Oddly, when he goes out to the internet to check (ipchicken.com) it's showing his public IP as: 107.200.x.xxx

I was under the assumption they would give him a single public static IP and everything internal would have remained 192.168.1.x

He's called them multiple times and they just keep telling him all of his devices need their own IP and he's responsible for assigning them.  They said static IPs are generally for corporate clients and they wont support a home with static IPs.

Anyone have any experience with AT&T and doing this residential?  Is there anything he can do at the router to have one public static IP and have internal devices get IP's via DHCP?
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cannot ping my cisco switch - its a Cisco SG350X layer 3 switch - please help

here is the running config

snmp-server location "8th Room"
snmp-server contact
ip name-server  192.168.11.6
ip telnet server
!
interface vlan 1
 no ip address dhcp
!
interface vlan 3
 name "Corp"
!
interface vlan 5
 name "Guest"
!
interface GigabitEthernet1/0/1
 switchport access vlan 5
!
interface GigabitEthernet1/0/2
 switchport access vlan 5
!
interface GigabitEthernet1/0/3
 switchport access vlan 5
!
interface GigabitEthernet1/0/4
 switchport access vlan 5
!
interface GigabitEthernet1/0/5
 switchport access vlan 5
!
interface GigabitEthernet1/0/6
 switchport access vlan 5
!
interface GigabitEthernet1/0/25
 switchport access vlan 5
!
interface GigabitEthernet1/0/26
 switchport access vlan 5
!
interface GigabitEthernet1/0/27
 switchport access vlan 5
!
interface GigabitEthernet1/0/28
 switchport access vlan 5
!
interface GigabitEthernet1/0/29
 switchport access vlan 5
!
interface GigabitEthernet1/0/30
 switchport access vlan 5
!
interface GigabitEthernet1/0/48
 dot1x reauthentication
 ip address 192.168.11.27 255.255.254.0
 no switchport
!
interface TengigabitEthernet1/0/1
 description UPLINK
 no spanning-tree portfast
 no switchport
 switchport mode trunk
 switchport trunk native vlan none
!
interface TengigabitEthernet1/0/2
 switchport access vlan none
!
interface TengigabitEthernet1/0/3
 switchport access vlan none
!
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Looking for advice on 3g-4g routers using external antennas. I have a client who is in the process of building a bed and breakfast who can get no cable or internet access so will have to use 4g. There is going to be 10 bedrooms with TVs for streaming and also multiple wireless access points. I have run Cat6 cable to a point in the roof space so looking for advice on best router and antennas please.
0
I have two routers that are currently only really being used as switches. We are multicasting data and have the router setup as an IGMP querier.
One router sends out the query as an IGMPv3 message whilst another sends the query as an IGMPv2.

Our application works fine with the IGMPv3 Querier router but I'm having problems with the new one. (We needed to change to get a router with smaller footprint)

Does anyone know the difference between V2 and V3 IGMP Queriers? I cant seem to find any information anywhere, I can only find the differences between V2 and V3 IGMP in general, not specifically the Querier.
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Hi guys,

I got a microtik - rb2011uias-rm model router board.
i got 2 questions.

1 - i created few deny policies from  external ip to my internal network. but i got many policies for each wanip. is there any way i can create like a group of wan ip. and make it a single deny policy ?     (right now i got many deny policies(1 policy for 1 each wan ip - i want it to reduce it))
2 - my router keeps logging me out for every few seconds. i can login again and make changes, all works . but it keeps kicking me out for every 30-40 seconds. anything to help me with this ?

thank you
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Dear experts, if the Access switch is unconfigurable of DHCP snooping, can we do it on Core switch? (The Dhcp is on Core)

Otherwise, how can we mitigate the rogue DHCP? Thanks!
0
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I have two Cisco Nexus 9K's at my core layer both with 96 copper and then some fiber modules.

I'm having a weird issue where random copper ports just stop working. Issuing a shut / no shut doesn't help. Because I can't always reboot the core I will just move it to another port. But whenever I do get a chance to reboot, the ports will work again.

These ports have a very simple config: switchport mode access; switchport access vlan X and a description. I am not running STP on these ports.

Anyone see this before? Any insight is much appreciated.

Thanks in advance.
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I am thinking about offering a paid service on my guest wifi router. Considering no one around me has internet aside from their phone which has 1 bar and it isn't 4G, I think this may be a smart idea. I know how to set up a log in self service screen using Ubiquiti hardware, however I am on a budget. My starter gear is a nighthawk AC 1900 router OR a DDWRT Linksys router.

Are their any tutorials out there on how to set up a self-service access that directs the user to a paypal or square page to pay for a set amount of time? Once I get some flow of money, I can gradually upgrade the hardware.

Anyone have any suggestions?

IF I  need to, I also have a desktop I can install a service on, once the device is connected to the wifi hotspot and it can redirect to a pay for website. I just don't know what to look for.
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I am studying for CCENT (ICND1) and I have 2 routers. On router 1 I can ping the internal network of 192.168.65.0/24 as well as I can ping router 2 (10.5.5.2). From router 2 I can ping 10.5.5.1 but cannot ping 192.168.65.0/24. I have setup a static route on router 2 telling it to route all 192.168.65.0/24 traffic to 10.5.5.1 (router 1). I am confused as to why it is not working. I have attached the show ip route from both routers in hopes that someone can tell me what is wrong. Thanks in advance.
0
We have a Cisco 3560 Switch with IOS 12.2 and need to get to an IOS that can use SSH.  Can someone point me in the correct direction?
0
We have two isps (Virgin and BT) and both hubs have been tested independently and work as advertised.

However, the point of having two isps is that, in the event of one going down, we still have a service.

Hence they are both connected to a Netgear ProSafe Bonding Router. (which, when it's working properly also bonds the services and allows us to approximately double our broadband speed in certain use cases)

My problem is that the router recognises the Virgin Hub, no problem. But does not recognise the BT Hub and this the admin screen is telling me that WAN 2 (the BT hub) is down, when it isn't.

I thought I'd cracked it when I realised that the default ip address of the BT hub was 192.168.1.254 which was already occupied by a Novell Server. So I changed the hub address to .200. Forced the router to refresh its search for hubs.  Nada.

Any ideas?
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Hello,

We have two Cisco ASA 5505 units in an active/standby configuration. Our network is primarily made up of servers that are serving web sites and other products and services, as well as remote access, rather than desktops and other end user PC's.

We have a couple of blocks of routable public IP addresses from our Internet provider that we use for assignment to various servers within the network. The ASA has a relatively complex set of ACL and NAT/PAT rules to support all of this and get traffic to its proper destination.

Our ASA is logging the following messages thousands and thousands of times per day:

<162>Sep 29 2018 16:58:02: %ASA-2-106016: Deny IP spoof from (x.x.x.x) to y.y.y.y on interface outside

The first IP address listed (x.x.x.x) is the public IP address of the outside interface of the ASA unit itself. The second IP address (y.y.y.y) is another public IP address that is in the block of addresses assigned to us by our ISP and that we are using for one server or another. The second IP address varies among our different public IP addresses each time the message is logged; the first address is always the public address of our ASA unit.

Why would we be logging thousands of messages such as this showing our own ASA's IP address as the source? Does this indicate actual traffic that is attempting to spoof IP addresses and cause problems, or is this more indicative of a misconfiguration somewhere on our network?

Any assistance would be most …
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.