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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.

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SNMP object not in the MIB

i'm working on an SNMP app that needs the ptopo MIB object with the object ID of 1.3.6.1.2.1.79 after enabling SNMP v3 on 2 layer 3 switches dell z9100-on brocade slx 9140 and creating a view on ...
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59 views

Layer 2 and Layer 3 traffic with one cable

Hers the topology. L2 switch L3 switch Router There are 2 VLANs. One VLAN ends on the L3 switch 1 VLAN on the router. Here is the question. Can i connect the L3 switch and the router with just 1 ...
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2answers
28 views

How to configure snat between 2 private networks having different nat pools?

Hi, i'm having some problems with the current configuration i have on this network. I have two nat pools one for the blue square routers, and another for the yellow ones. And i'm using snat to have a ...
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2 floor home, internet disconnection in the secondary router [on hold]

Model: Archer-C60 Hardware Version: V2 Firmware Version: 2.0.0 Build 20161206 rel.60287 Hi, I have a problem in my home, I have 2 floors, in the first floor I have the internet provider router which ...
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5 views

Home Host And Separate Networks [on hold]

Hello to the good people of Stack Exchange. Firstly, happy fathers day to those who are celebrating - I hope I am not taking up to much time in your day. I have a question regarding home hosting and ...
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QUESTION Router SPEEDS [closed]

Good Morning Everyone I'd like to know if my Latency will Improve if I buy a Aftermarket Router, ISP provided me a Modem-Router but it seems that this modem-router is really low end I get bandwidth ...
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0answers
21 views

What's the process to use a cellular wifi hotspot as an ISP? [closed]

I'm currently waiting out an ISP outage. I have a Radware box that has static rules to push clients to the secondary ISP should the primary ISP go down. My secondary is the one that's down, so nothing ...
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0answers
26 views

Whether all the edge router has the CERT `Advisory CA-1996-21` process up? [closed]

Whether all the edge router has the CERT Advisory CA-1996-21 process up? We know after the DDoS attack of Panix at 1996.9, the CERT release the CA-1996-21 announcement. it is take effect of edge ...
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2answers
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How to configure NAT between 2 private network ? CISCO routers

If anyone can help with configurations it will be helpful
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7 views

Do I Need to Use Bridge Mode on a Gateway with WiFi to Use a Dedicated WiFi Router? [closed]

I have a client that had been experiencing slow internet service and dropped WiFi connections using the ISP-provided gateway, which also provided WiFi. My analysis led me to believe the WiFi ...
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25 views

Routing problem [closed]

I cant ping from Laptop 100.15 to laptop 8.10 but CAN ping from 8.10 to 100.15. I have tried add route but no success. Any help ? Rgds,
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2answers
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How many public static ips do one need if a PC is behind a wireless router?

If a PC is connected to internet through a wireless router. How many public static ips do one got to get from the ISP. Do the router and PC both require one static IP. What if I want to add more PC ...
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1answer
12 views

LAN to LAN Connectivity of Moxa routers

I am with background of DevOps and to optimize stuff in office i am assigned a networking task with not much experience of networking. My scenario is like below I have two moxa (EDR-810) routers ...
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0answers
18 views

Are there NATs which will block any further incoming packets from a peer after rejecting first one?

I'm attempting to test udp hole punching. Right now I'm simply testing how my computer reacts behind a router. If I send a udp packet from my computer to a server, it can reply back on the same port ...
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2answers
32 views

How to cascade two routers [closed]

When I connect two (Zyxel) routers in a cascade configuration, I don't know how to set the right address on the Lan Interface between the outer router (the one on the top of the diagram) and the inner....
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1answer
33 views

My Juniper Router arp do not work, after clear MAC then it can work

In my MX Juniper router device, there have the IP 16.213.40.1's address: {master} admin@juniperMX> show arp no-resolve | ...
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45 views

Unable to ping other pc or router nodes on wireless network in CORE network emulator

I am attempting to utilize the NRL CORE network emulator in tandem with EMANE to emulate a wireless network for research, but I am encountering problems getting wireless networks to function in the ...
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2answers
217 views

What are neighboring ports?

I know this is as basic as it gets but I can't find a direct answer to this question. Are they ports on two different switches (or routers) that are connected by a cable? Are they the ports ...
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2answers
40 views

Overload PAT Question

Learning details of NAT PAT. I understand basics wherein the PAT router incorporates a source port to ID the private address computer communicating out on the public address, enabling the public ...
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2answers
84 views

How can a IP under a VLAN communicate other VLAN's IP?

I have a network topology as below: I want to use the Server0 to manage(communicate) to 10.10.10.1-3. you know the 10.10.10.1-3 are vlan100's SVI. there have vlan 100 and vlan 501. IP programme: ...
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1answer
40 views

RIPv2 Routing not pinging between two serially connected routers?

I'm new to networking and am currently 6 months into a course for it so there may be some noob mistakes or really silly answers/questions here but bare with me. I have a task to setup RIPv2 routing. ...
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1answer
18 views

How does a router calculate a MTU [duplicate]

For a given link type, how would a router calculate it's MTU? I initially thought of it taking a brute force approach, using a binary search to figure out the point at which the link fails to support ...
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1answer
109 views

Route between two routers

This is the topology I'm working with. I'm able to ping from VPC_LAN_Ato VPC_LAN_B and trying now to ping from those lans to Router_2_Cisco. Here are the configurations for these 4 devices: ...
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1answer
48 views

Can't ping across router with two interfaces [closed]

This is the topology I'm working with. In the router, e0 is ether1 and e1 is ether2. LAN_A has a maximum of 96 clients. LAN_B has a maximum of 48 clients. VPC_LAN_A: ip 192.168.10.1/25 192.168.10....
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1answer
117 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 ...
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1answer
29 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 ...
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1answer
33 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 ...
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0answers
17 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
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1answer
89 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 ...
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1answer
40 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?
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1answer
215 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 ...
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1answer
24 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 ...
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3answers
396 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 ...
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1answer
30 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 ...
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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?
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2answers
37 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, ...
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1answer
39 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??
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3answers
122 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 ...
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1answer
48 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. +---------------+ +---------...
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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 ...
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1answer
31 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 ...
2
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1answer
52 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/...
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0answers
77 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
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1answer
74 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. ...
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4answers
131 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?
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1answer
97 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 ...
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1answer
56 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 ...
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1answer
44 views

Can a router be part of multiple HSRP groups?

Because we configure HSRP on interface level, is that possible?
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3answers
440 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 ...
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1answer
47 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 ...