Questions tagged [routing]

For questions about routing, the process of selecting to which network path traffic is sent. Consider using a more specific tag if your question is about a routing protocol like BGP or OSPF.

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21 views

Will Main Router be overloaded in this scenario?

The Main router in my planned office network assigns IP addresses to all PCs through DHCP and also connects to the internet via GPON modem. 5 PCs and 1 server are connected to a 8 Port simple switch. ...
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14 views

How can I put a WiFi client and an Ethernet client to the same group? [closed]

I have wireless interface wl0 and ethernet interfaces eth0, eth1, eth2, eth3 all in the same bridge br0. Now I have to put one of the wifi clients and one ethernet client to the same group so that ...
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16 views

How does advertising a route using EIGRP break connectivity? [closed]

My question is really two parts. How does advertising a route on EIGRP break connectivity to a site and how does one begin to troubleshoot something like that. To provide from context, I'm not Cisco ...
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12 views

How to do auto tunneling or auto port forwarding for an app over a router? [closed]

The question is very clear. Just how to let an app to communicate with other apps on WAN by crossing the router. Tunneling is good for fixed back and forth communication but not good for one way from ...
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Connect two local networks [closed]

I'm trying to connect two local networks together. 2 networks scenario (this image shows current config) Network 1 (192.168.1.1) is connected to 10GBe Internet via router with dhcp. I've added switch ...
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1answer
22 views

Two sites with public IP's in same subnet. Spoof detection

I have encountered an non standard issue and can't seem to figure out a way to get it to work. I have 2 sites, 1 main and one branch. At the main site I have 2 ISP's and the branch I have only 1 ISP....
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0answers
19 views

Allied Telesis “no switchport” Cisco command [closed]

I am trying to use an Allied Telesis L3 Switch to route multiple vlans. I used to run the "no switchport" command on a L3 Cisco switch to make the interface Layer 3 capable. Whenever I run the "no ...
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1answer
14 views

Ping time varies between two devices in the same LAN [closed]

I am trying to ping between two devices A [Server] and B[Router]. From A to B the average ping response is about 1ms and from B to A is 0.5ms which is half. As a result, if I scp a file to B, by ...
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12 views

“tracert” to google.com shows number of failures in between - Testing from my home - I use comcast [closed]

Using windows 10, I was just curious & tried "tracert google.com" After 15 hops it shows "Request timed out" for the next 11 hops. And then on the 27th hop it shows google.com's IPV6. Below is ...
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1answer
24 views

Sonicwall: force all traffic from specific source through VPN

We have a main office (M) with a Sonicwall TZ215, and a branch office (B) with a TZ210. Computers in B access the server in M through a site-to-site VPN between the two Sonicwalls. Internet traffic ...
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2answers
70 views

What does the BGP protocol consider when determining the best path?

What does BGP protocol consider when determining the best path? Why is it considered the slower than interior routing protocols like RIP, OSPF, etc?
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18 views

Is it possible to access 127.0.0.xxx in anyway [closed]

So I've been configuring my network at work. We've got a lot of devices from NAS servers to Dante AoIP devices. While configuring some of my devices I managed to set the IP adress of one device to ...
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2answers
40 views

MPLS : who owns the ingress & egress routers?

I'm trying to understand MPLS. It states that the routing doesn't happen at each router, and it starts with a "Label Edge Router". For example, if company X uses ATT as the provider for MPLS, then ...
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0answers
12 views

Commercial WiFi to local network for RV / TinyHome [closed]

Attempting to connect ~6 devices to an enterprise wifi hotspot by creating a local network to reduce sign in problems for smart TVs and IoT, however the network in question (GoWifi) has a sign in ...
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1answer
38 views

building a project for my final year project course

i'm building this project for my final year project course. here,there is a cloud and all ports are bridged..and nearest router has taken IP from cloud over dhcp. r1,r2,r3 are contact with their ...
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1answer
53 views

Routing protocol comparisons (with Linux) [closed]

I am doing some thesis about comparison of routing protocols, most notably how (how good, how fast) they react to changes in the underlying network. Not sure if this makes any sense, but too late to ...
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0answers
13 views

Shouldn't Pings Work on Some Hosts When VLSM Overlap Occurs? [closed]

I am studying for the CCNA exam and came across a comment related to a networking problem that I do no understand. The network is as follows: PC1 connects to R1. R1 connects to R2 and R3. R2 connects ...
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2answers
47 views

Understanding the IS-IS wide metric style for Traffic Engineering in Juniper MX

Can someone please explain why do we need to enable 'wide-metric' for IS-IS if we are going to enable MPLS Traffic engineering on Juniper MX routers? I mean what does traffic engineering has to do ...
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1answer
34 views

Interconnect overlapping networks without NAT [closed]

in our company we are trying to implement a backup system for external clients and we are looking for the best way to interconnect customers with our DC. The problem we are facing, is that some of ...
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0answers
46 views

How is it possible to have a default gateway outside of the network range of any interface? [closed]

I always thought that the default gateways has to be on the same network as the server/client trying to connect to the internet. However today I rented a server from Hetzner and the server is able to ...
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2answers
33 views

How TCP connections between origin and node servers over a BGP Anycast gets established?

Server A and B have the same IP address with anycast. Server B connects to the origin server that is very close to server A and very far away from server B, since server A is closer, the response will ...
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1answer
20 views

Remotely Connecting an IPv6 Computer to a IPv6 Private Web Server

I have a private web server at my office, and I want to access that server remotely at my house via IPv6. My office has both IPv4 and IPv6 enabled, but my home has only IPv6. IPv4 works, but I have ...
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1answer
63 views

ICMP message doesn't leave NIC of PC

I got an interVLAN configuration a.k.a 'Router on a Stick'. I can ping all the workstations with each other, except PC9 (refer to image). I did a simulation and found that the packet does not even ...
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1answer
41 views

How important is it for time to be synchronized between adjacent OSPF neighbors?

I have two routers that; when first powered up, will initially form full OSPF neighborship with each other and exchange their respective advertised routes with each other. After approximately 2 hours ...
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0answers
34 views

Problem in cisco routing bgp routes

We have an outbound route-map on an eBGP peer that adds some communities to certain prefixes. Is there any way to prove that this is actually happening from the sender side in classic IOS? show ip ...
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1answer
37 views

PacketTracer: Why can I not ping from one to another router?

I'm trying to ping from Router DC_GE to BE: I uploaded the Packet Tracer File (v. 7.2.1): https://www.4shared.com/file/aEsd_0Piiq/Topologie_Ausgangspunkt_MH.html CD_GE: CD_GE#show running-config ...
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1answer
58 views

Router can ping and resolve hostnames, but VLANs and switch cannot

I recently installed an Adtran Netvanta 4430 to perform some basic VLANs on a network with a little bit of inter-VLAN routing, and I'm having a few odd issues, probably attributed to my inexperience ...
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0answers
17 views

Cisco Virl instace issue

i'm using cisco virl on dcloud and when i try to run my topology consisting of 2 ios routers and an iosl2 router i get an error... stating that i've exceeded quotas, required 4, available 0. Any ...
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2answers
35 views

Why doesn't kernel itself had entire L2/L3 protocol stack? [closed]

I know kernel itself handles protocols in layer 2, layer3 and layer 4 at ipv4 stack, but why can't kernel itself doesn't have protocols such as STP/RSTP/xSTP/OSPF...etc, implemented. Why should we ...
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1answer
147 views

What is meant by AF?

For example, route manual says: route {-h|--help} [] Detailed usage syntax for specified AF. What is meant by AF ? I tried to google the term but no success (found only something about an af-...
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0answers
16 views

How to calculate subnet mask including, network address, gateway, broadcast address and host range? [duplicate]

You are defining network boundaries within a /24 network of 172.30.20.0/24. Please complete the segmentation of the /24 to account for multiple smaller networks of 115, 50, 28, 12, and 5 hosts. ...
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2answers
64 views

Is there a way to manage IP space with only a switch?

Is this scheme possible? External provider = External provider of the internet Generally speaking, is there a way to assign a public IP address individually for each server to be used when SFP+ port ...
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1answer
42 views

IP Routing and Switching Interface Speeds

I have a question that relates to routing and switches. I am looking to set up a new Firewall that will handle the routing for the network and attached to the Firewall will be a switch. Here are the ...
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1answer
199 views

What is the difference between Cisco's QoS models and strategies?

I have been reading about QoS and different strategies. From what I understand, Cisco proposes three different models and three different strategies for QoS. For strategies, you can have a 4-class, ...
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1answer
42 views

Access a device connected in another switch

I have theses two switches, 3Com 4500 and 3Com 2928. 3Com 4500 - IP: 20.20.X.X ; Mask: 255.255.240.0 3Com 2928 - IP: 192.168.1.X; Mask: 255.255.255.0 There is a printer(20.20.2.1) connected in the ...
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2answers
54 views

Same /24 IP prefix, same AS for 2 different locations, possible?

Let's say I have 2 locations: 1. the United States Datacenter 2. the Russian Federation Datacenter I have 1 /24 Subnet with 1 AS. Both sites have a different ISP. My target is to: allocate /24 for ...
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3answers
61 views

TTL And Wildcard mask

I have two questions that i wanted to ask before. What is TTL?! I know that it's time to live for packet to die it count how many hops you jump in it every icmp but i don't know how it works and what ...
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1answer
67 views

Fortigate and ipv6 routing

I have a Fortigate router and my ISP support ipv6. I'm getting a public ipv6 on the Fortigate and also on the computers on the lan (2a02:a18:9041....) I have not to much understanding of ipv6, but by ...
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6answers
3k views

packet routing between subnets on same vlan

I am trying to understand how packets are routed within the same VLAN. I understand that typically there should be a 1:1 mapping between VLANs and Subnets. However if i deploy the following ...
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1answer
45 views

What are Cisco Devices? [closed]

I am doing CCNA online and not for a minute have I not failed to come acroos the statement 'Cisco Device' What exactly are cisco devices ? Please don't tell me 'Devices that use Cisco iOS' Can you ...
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1answer
45 views

How to check the route table on a neighboring router?

I have a router in a network, which use to show list of routes in the route table. Using the command- show ip eigrp topology I see some of the routes are removed after sometime, which were advertised ...
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1answer
51 views

BGP local-as command clarification

On my network infrastructure, an Arista switch is the core switch and a pfsense server the gateway. BGP is used to advertise routes for all the internal networks. On Arista switch, I see the BGP ...
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1answer
33 views

Unicast Adjacency Routes Nexus (AM) Cisco Nexus

I have an odd situation. There is static route on my Nexus 7700 that routes anything for specific subnet /24 to a F5 LTM Load Balancer, external VRRP interface 10.x.153.15. As you can see below, ...
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2answers
143 views

Industrial Ethernet network design

looking for some advice on network architecture for an industrial switchroom with several constraints. Modbus TCP devices are located in motor control centre cells, these need to connect to the ...
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1answer
24 views

Bandwidth limit between CPE and Provider Equipment

I have 4 different WAN links for redundancy one of them is 15mbps MPLS and the other ones are 30mbps Internet , 50 mbps Internet and 10 mbps MPLS , the way that it is set up is that we have load ...
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1answer
30 views

Can't access services on my other IP on same network interface GNS3 and Host [duplicate]

I have one physical NIC that is assigned an IP address (10.14.255.240). Inside of GNS3 network simulation tool, I also have a another 'virtual' interface with another ip address (10.14.255.245). Both ...
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5answers
2k views

Is policy routing bad?

I heard that network engineers tend to avoid policy routing. I am thinking to source-address dependent routing for example. Is policy routing bad practice? If so, why?
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1answer
33 views

OSPF: What's the consequence of two nssa area translator router

If NSSA area has 2 ABR, then usually one of them will be elected to be translator by router id. But what if I have 2 translator routers and both translate the message simultaneously? How to route in ...
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1answer
59 views

How does the BGP UPDATE message propagation work?

I am currently reading about Routing around Congestion Defense and the non feasibility of this approach. Since to use this method a lot of BGP poisoning would be necessary and to switch paths several ...
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1answer
53 views

LAN to WAN IPv4 address mapped to LAN server through NAT Rules or other

I need to set a rule that allows me to connect BOTH from OUTSIDE the LAN (from the "internet" to the Internal server at IPv4 address 10.64.0.50 via port 22, by running ssh://1.2.3.4 -p 22; AND From ...