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Questions tagged [router]

For questions about network routers, devices that forward data packets between computer networks, commonly at the network layer (layer 3) of the OSI model.

3
votes
1answer
86 views

Ingress filtering on edge routers and performance concerns

The RFC 4778 cover the Operational Security Practices in ISPs Environments back on 2007. Among the best practices, a common one is Ingress Filtering on edge routers. In the above RFC, the author says ...
0
votes
0answers
7 views

Best settings for home network router [on hold]

what should I keep enabled and what should I disable for best performance. Now Im losing packets very often. Internet provider told me there is no problem on their side.. :/
7
votes
1answer
1k views

Raw API data for Cisco Meraki CMX Dashboard

Has anyone worked with Meraki's CMX raw data feed and can help answer some questions? I came here to ask because I have found no conversations about Meraki's CMX API elsewhere and I imagined that ...
-1
votes
0answers
6 views

Combine link sharing and connection failure detection with TL-R470+ router [on hold]

I've got a TL-R470+ load sharing router, which is connected upstream to two modem/routers which in turn connect to DSL lines. I want to load share across both upstream connections. The load sharing ...
0
votes
4answers
123 views

Why do Vlans need routers to communicate?

Why do devices on two separate VLANs (Virtual LANs) implemented on the same switch require a router to communicate?
5
votes
4answers
5k views

Does a router have multiple nics?

I am currently doing an internship and I hear the IT Director referring to a router port as a NIC. I can't remember exactly what he said. Also, in my Networking+ book it states that each dynamic ...
0
votes
0answers
28 views

Default gateway query/Confusion [on hold]

I have VMware workstation 15.X and set up the following networks set up via the network editor: VMware workstations on a Vmware Network (Vmnet). The ip subnet of 10.3.3.0. VMware workstations on a ...
0
votes
0answers
7 views

Hook second router to internet wirelessly? [on hold]

I have a router hooked up to a modem, and I have another router. What I want to do, is have the router broadcast a completely different network than my other router, but still have my second router ...
0
votes
0answers
9 views

How can I add a storage device to my router? [on hold]

How can I add a storage device such as pendrive to my router , which can be accessed by all device connected to the lan network (router) ?? NB : low cost is a must 😁 TIA
0
votes
0answers
11 views

Problem with Sharing a 4G Network using multiple Access Points [closed]

I have a really interesting problem in my home network currently. Due to DSL speed limitations of our ISP in my area, I upgraded to 4G network with roughly 3x the speed I get from my previous DSL ...
0
votes
1answer
26 views

What happens if we try to access an IP Address that does no exist

Beginner Question: I just read an article talking about how the internet works and how routers make sure that packets arrive at the destination. However there is one thing that is not explained ...
1
vote
2answers
692 views

How can the Cisco Packet Tracer show the port's name?

How can the Cisco Packet Tracer show the port's name? the GNS3 can show its interface name.
1
vote
1answer
27 views

High CPU utilization on Juniper ACX2100 chassis fpc

What is the cause of high utilization of cpu on fpc.Below is the output of which depicts utilization as 99 but router is running just fine. show chassis fpc Temp CPU ...
-1
votes
0answers
13 views

Cisco Packet Tracer - How do I connect these networks through a router? [closed]

I am trying to connect these two switches through the router as shown and also correctly configure the wireless router on each network so that they connect to their switch. Basically anywhere there's ...
-1
votes
0answers
17 views

Making Ubuntu 14.04 “Man In the Middle” [closed]

I want to capture the traffic between my router and a Microcontroller device using wireshark, but my router doesn't support port mirroring. I read in another forum post that if I have two Ethernet ...
0
votes
0answers
15 views

take oid of interface on router via snmpwalk for monitoring

Could someone explain how to get oid value of an interface via an snmpwalk ? I have some value like : iso.3.6.1.2.1.2.2.1.2.15729260 = STRING: "vlan 110" Thanks in advance for help
3
votes
1answer
83 views

High Memory Utilization in Juniper ACX2100

Recently i observed that one of our juniper AC2100 has only free 3% of memory.But i'm unable to understand which thing is causing such high memory usage or what i can do free the memory so it won't ...
1
vote
1answer
39 views

Configuring routers on Cisco

If I have three routers R1, R2, and R3 that are interlinked, then when configuring, do I have to give the command: description Link to R2 description Link to R3 when configuring R1?
6
votes
3answers
2k views

Can I announce prefix 161.117.25.0/24 even though I don't have all of /24 IPs?

I'm managing one BGP router, under the router I'm trying to announce the following IP prefix:161.117.25.0/24. But the problem is that some of the IP addresses were borrowed by other AS(Autonomous ...
3
votes
1answer
209 views

Which physical interface would be used to send/receive packets intended for a loopback interface?

Let us say, I have configured the managed router with a loopback addresses - Interface IP-Address OK? Method Status Protocol GigabitEthernet0/0 ...
2
votes
1answer
23 views

Is a new Frame created between Routers and also Hosts

Trying to understand how frames are structured between hosts and routers. My basic understanding is that a new frame is required to encapsulate a packet from each router. Example being, if you have ...
4
votes
3answers
111 views

Do I need to add something to support inter-VLAN communication?

In my network using Cisco router/SW C1111-8p, the native VLAN 1 is not connected and doesn't have IP. VLAN10 192.168.10.1/24 with vlan10 DHCP pool VLAN20 192.168.20.1/24 with vlan20 DHCP pool Both ...
2
votes
1answer
73 views

Cisco Embedded Packet Capture with NAT

I love the ability Cisco's Embedded Packet Capture (EPC) provides to remotely troubleshoot dataflows on IOS routers. monitor capture buffer CAP_BUF monitor capture point ip cef CAP_PT gig 0/0.1 both ...
3
votes
3answers
386 views

Collision domain question

I'm studying for my CCENT exam, and not quite sure why the book (official Cisco) says that there are 5 collision domains in this example. Isn't it supposed to be 4? The hub on the left, the hub in the ...
3
votes
2answers
3k views

What is IP-over-DNS tunnelling?

What is IP-over-DNS tunnelling please? I have seen this term used in the context of a captive portal. The idea was to redirect clients to the local web server and to force the DNS (?). It was ...
2
votes
1answer
28 views

Bonding and switching between 2 different Links/WANs/Interfaces

Before I ask anything, I'd like to say that I pretty much searched a lot (to what I know of from keywords and terms such as "bonding" "wans" "links" "failover" "aggregate") and I couldn't find any up ...
5
votes
2answers
62 views

Cisco 2821 hangs with “No memory”

I have one (pretty old) 2821 router, running BGP with 2 ISPs. (C2800NM-ADVENTERPRISEK9_IVS_LI-M), Version 12.4(24)T5 Sometimes for unknown reason it just hangs, and as it is remote location I cannot ...
2
votes
1answer
416 views

GNS3: No Response When Pinging Router Connected on Second Serial Interface

I'm attempting to set up a network with 3 Routers. A "West" and "East" router are each connected to a "Central" router via a PA-4T+ serial interface. The first interface (s1/0) on the Central is ...
0
votes
0answers
10 views

Managed / Unmanaged Switch [duplicate]

This is a basic question, But can someone clearly state what is the difference between managed and unmanaged switch? Also, do managed switches maintain their own routing table?
1
vote
2answers
32 views

How does a router logically process packets going into and out of the DMZ?

I wanted to ask this question because of the fact that through CompTIA Network+, I learned that internet exposed services/servers/devices are to be placed in the DMZ like email servers, DNS servers, ...
2
votes
1answer
27 views

RV260W as Access Point

We recently upgraded to a proper firewall, with some help from this community, and are now looking to repurpose our RV260w as a wireless access point. I tried already, but I was trying to use the WAN ...
6
votes
1answer
63 views

How to set IPv6 RA values for RDNSS and DNSSL on HPE/Aruba 5400R

I am detail-planning the roll out of IPv6 in our company. Right now I am stuck with IPv6 RA on our HPE/Aruba Access Switches. I cannot find any documentation how to set the Recursive DNS Server (RDNSS)...
2
votes
1answer
37 views

GNS3 Routers - what is the difference beteween line con 0, line aux 0, and line vty 0 4?

Totally new to this and am not sure what the difference between them are. Can anyone explain this to me in simple terms??
3
votes
0answers
74 views

Need to configure site to site SSL VPN between two Cisco routers

I would like to configure site-to-site SSL VPN between two sites. I originally set up an IPSec VPN between the two Cisco routers and found I was only getting 10 percent of the available bandwidth. ...
2
votes
1answer
43 views

What do I need and where to setup 2 VLANs with a Cisco router 1100 series with a wifi AP Aironet 1300 series

I am struggling and I don't really know what I need to setup my network. I have a Cisco router C1111-8p (8 switch ports) and a wifi AP C1832. +---------------+ +---------...
2
votes
1answer
44 views

How to setup a WAN port in Cisco ISR 1111?

The C1111-8p has 2 WAN ports and 8 switch ports. I am trying to set up the WAN port to an optical fiber modem, the ISP provided: IP address Mask Gateway DNS1 and DN2 I need to set up the port GE 0/0/...
2
votes
1answer
623 views

Does VRRP or HSRP work with 2 different upstream ISPs?

We setup two Cisco ASRs as edge routers, each with a connection to a unique upstream ISP. Both routers are advertising the same IPv4 /24 prefix to their ISP via BGP, and both are connected to the same ...
3
votes
3answers
236 views

No traffic on Router

I'm facing this problem from last 10-15 days. One of my Locations is connected thru MPLS (Router IP 10.34.7.2) (See image for setup). The users are complaining of slow or no connectivity. on checking ...
1
vote
1answer
2k views

Beginners Guide to VLAN with Netgear & Ubiquiti HW VLAN101?

I've got a few questions related to networking, more specifically VLAN'ing. I've got a Gateway/Router - Ubiquiti USG I've got a 48Port Netgear Switch - Netgear GS748Tv5 L2+/L3 Lite I've got 5 ...
2
votes
1answer
182 views

Configuring multiple subnets with switch connected to single router interface

I have a design like this But I'm receiving a lot of mismatch errors and it doesn't work at all. I tried to ping 10.0.0.1 to no avail. I'm trying to configure the vlans on the switch 1 this way (...
9
votes
4answers
2k views

Measuring per-link latency/jitter/packet-loss

I need to measure the latency, jitter and packet-loss per link in a network, as opposed to end-to-end, e.g. like this: s1-eth0 <--> s2-eth0 (~ 20µs avg. latency, standard derivation 10µs, 57 % ...
2
votes
1answer
64 views

Duplex mismatch between a Fast Ethernet router and Gigabit Ethernet switch with auto negotiation

i am connecting c3745 router on fast ethernet 0/0 interface with a IOSvL2 switch on gigabit ethernet 0/1 on GNS3. i have set the negotiation on the switch to auto for all interfaces on the switch. ...
3
votes
3answers
432 views

Do VLANs within a subnet need to have their own subnet for router on a stick?

I have been creating a network lab in packet tracer for practice. I have 3 vlans in subnet A and I am trying to configure router on a stick at gig6/0 on the bottom left of the image. Do I need to ...
4
votes
1answer
91 views

Cisco 2960L and ISR 4331 throttled WAN speeds

I have tried finding a solution to this issue and the closest I have found thus far can be found here. https://www.reddit.com/r/networking/comments/8f2sn0/throughput_limited_by_cisco_2960_switch/ My ...
2
votes
1answer
55 views

Need some help booting Cisco 2600 Router

I'm new to the forum and I'm working on my CCNA cert. I received a 2600 Router last week and it boots but only into ROM mode. It appears it needs more memory to run the current image. Besides adding ...
3
votes
1answer
43 views

Can a router be part of multiple HSRP groups?

Because we configure HSRP on interface level, is that possible?
1
vote
2answers
65 views

802.1X Auth for Clients and Servers

I'm about to introduce 802.1X Authentication to my current network for wifi and wired connections: My Setup: I have a Windows Domain Controller and I wanted to use the Network Policy Service for ...
3
votes
2answers
66 views

How to: Setting up SNMP on various Cisco platforms & Can you recover or configure a switch using SNMP?

How do you setup SNMP on different Cisco switches or routers? Is it possible to limit the IP addresses/subnets, that can access the SNMP communities via access lists? How do you recover or configure ...
5
votes
1answer
42 views

Rate Limit on Main Aggregated Interface (AE) without applying on Unit Level in Juniper MX

I want to apply rate limit on Main Aggregated Interface (AE) without applying on unit level. We have a customer connected with our Juniper MX480 via 100G Interface. The single 100G interface is a part ...
1
vote
1answer
68 views

How to explain that a route has two different AS numbers?

I have a question about the AS path, see the below example where I show the route 114.114.114.114. This shows several BGP routes. See the fist route item. The AS path is 4809 4134 I, I want to know ...