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.

Filter by
Sorted by
Tagged with
0
votes
0answers
7 views

“Replace” IP with an other IP in the network [closed]

Hihi, I recently bought a weather station and found out it is publishing its data to an online weather service site via calling GET <IP-Adress>/updateWeather... I can not change what IP-Adress ...
-1
votes
2answers
40 views

How does the packet travel when I send a ping?

In command prompt when I fire the ping 10.1.1.2 Assume that I am located in Germany and the above IP address belongs to California. How does the packet travel from my computer (Germany) to the ...
1
vote
3answers
27 views

Communication at the DataLink Layer

I understand the concept of packets hopping through multiple routers to reach the destination network. I guess this has something to do with the forwarding/routing mechanism implemented in routers. ...
0
votes
1answer
41 views

Why I can't ping in my network?

I have the following network: The following is my interface table: This is my PC IP address table: This is the configuration for Router ISP: ISP#show running-config Building configuration... ...
0
votes
2answers
28 views

Where is the packet sent if it is determined to be for an host on local network?

When a host attempts to communicate with another device using TCP/IP, it performs a comparison process using the defined subnet mask and the destination IP address versus the subnet mask and its own ...
0
votes
1answer
22 views

how to configure EIGRP in my network?

I have the following network With the following routing table: Configuration of router 1 Building configuration... Current configuration : 1056 bytes ! version 15.1 no service timestamps log ...
1
vote
1answer
92 views

Static routes and subnetting

Network: 10.0.0.0/24 I decided to divide it into 4 sub-networks: 10.0.0.0/26 10.0.0.64/26 10.0.0.128/26 10.0.0.192/26 If I have to configure static routing on an external router, can I use the ...
0
votes
0answers
17 views

NAT and public IPv4 address [closed]

As far as I know there are more or less 4 billions of possible IPv4 addresses. I am having concerns about limitations. If each home router provided by ISP is granted a public IP address (local traffic ...
0
votes
0answers
45 views

Why cant my network send packages but piv6 pings go through?

I have the following network: My routing is as follows: Device configuration for ISP: Building configuration... Current configuration : 1388 bytes ! version 15.1 no service timestamps log datetime ...
0
votes
1answer
33 views

Does a router have multiple DLLs inside?

I came across a practice question of true/false answer type . The statement is: "A router has single network layer that will interact with 2 Data link layers" . Ans:True (no explanation ...
0
votes
2answers
27 views

Valid routes iBGP advertisements

Routers announce to their iBGP peers, the Best routes for each networks it has in its database Is it possible, to announce additionally to the Best route, also all the Valid routes to the iBGP peers ?
0
votes
1answer
29 views

Static routing with multiple networks/nodes

Here's the network topology: Here's the routing table of the R10: My routing table is right? I just want to make sure I understand the static routing and how it works if one or more nodes fail. ...
1
vote
1answer
27 views

Does RIP v1 store next hop in its routing tables?

Does RIP v1 routing protocol store "next hop" field in its routing tables despite not announcing it in the updates? And if yes, how does it do that, simply by storing the address of the node ...
1
vote
1answer
59 views

I cant ping across Lan?

Current configuration : 2695 bytes ! version 15.1 no service timestamps log datetime msec no service timestamps debug datetime msec service password-encryption ! hostname ...
0
votes
0answers
31 views

iBGP Question reagrding Distribute - List from EIGRP

So, I have the following topology. A-B | | C-D A-B-C-D are Routers. It doesn't matter what are the IP's of the interfaces. What matters is that I have 2 loopbacks for each router. 1.1.1.1 and 11.11....
0
votes
1answer
40 views

Understanding BGP communities

Lets take this basic topology: RTR A ---- RTR B Routers A and B have an eBGP connection. At router B we can have a route map saying: match: community-list xyz action: permit/deny etc Questions: How ...
0
votes
1answer
42 views

Using a single device as both a media converter and switch

So I have an Aruba 2530 switch with a couple of SFP slots, an incoming fiber connection and a modem that only has RJ45. There's limited space and I want to use as little boxes as possible. Is there ...
0
votes
2answers
48 views

Is It possible to make Router On A Stick with two physical interfaces in the router?

If we try to implement router on a stick (ROAS) for try interVLAN communication, we must to use one Phisical interfase and split it into several "logicals" interfaces. Until Now all right. ...
1
vote
1answer
58 views

I can't ping the gateway IP (fe80::1) from the internal port in my fortigate 60f firewall

I am using a fortigate 60f firewall. I have configured it for both ipv4 and ipv6. I have used the SD wan (by adding wan1 and wan2) for load-balancing. Moreover, I have configure a default static route ...
0
votes
2answers
50 views

Why does ARP request not use a router instead of broadcast?

Why in ARP request does the source computer broadcast a message with the destination IP address to find the MAC address of the destination computer? Why doesn't it send the message to the default gate ...
0
votes
1answer
56 views

I cant Ping from lan 192.168.44.0 and 192.168.45.0 , pc 3 pc 4

R0 and R1 are linked with ospf , and R1 with static route with MLSw. If i change R1 conn with MlSw to #ip route 0.0.0.0 0.0.0.0 g0/1 or g0/2 i can ping , but need help with static route conf ...
0
votes
2answers
20 views

In Routing Tables how does the Interface affect the gateway Gateway?

I'm Looking at this routing table from netstat -r. How does the interface relate to the Gateway? the first entry has gateway 192.168.1.1 which is the gateway to the router. the Interface says 192.168....
0
votes
1answer
28 views

ping shows different outputs

Both VLANS are working, and pings from R1 to R0 and vice versa also work successfully. But when I ping from the pink PCs to the blue PCs I get destination unreachable, and when I send pings from the ...
0
votes
1answer
67 views

Unknown cause of disappearing CAM table entry and unicast flooding

Posting this in response to the closed question: Network flooding without ff-ff-ff-ff-ff-ff (layer 2 broadcast) MAC address in destination? I have a network that is experiencing the following problem: ...
2
votes
0answers
47 views

Communication between subnets on Sonicwall firewall

I have a Sonicwall TZ-350. X0 is the default LAN with IP 192.168.10.1, and X1 is the WAN. I've set up a second local subnet on X2 with IP 192.168.20.1 for a single NAS device (no switch; the device is ...
0
votes
2answers
40 views

How does RIRs actually ensure IP ranges ownership

I'm currently learning about CIDR, subnets and IPv4 classes. I understood that IPv4 classes were used to route traffic in the beginning but nowadays we use "dynamic" subnet masks with the ...
0
votes
1answer
44 views

Network flooding without ff-ff-ff-ff-ff-ff (layer 2 broadcast) MAC address in destination? [closed]

It appears that a switch is sending the same traffic to all ports in a VLAN: In a Wireshark capture on host 192.168.0.10 with MAC aaaa.aaaa.aaaa I see packets with MAC destination bbbb.bbbb.bbbb and ...
0
votes
0answers
12 views

InterVLAN routing on Cisco router with multiple trunks [duplicate]

I recently came across a scenario where I wanted to (ab)use a Cisco router (ISR 4331) as a layer 3 switch. The router is directly connected to two switches. The connection between each switch and the ...
0
votes
2answers
40 views

If router recieves the source IP 0.0.0.0 then it will forward it or drop it?

If hacker change the source IP to 0.0.0.0 and checksum is same as previous, then what will be the router do when it recieve this packet???
0
votes
1answer
30 views

Unable to ping switch

Why can't i ping S1 from PC-B, but it's possible to ping PC-A? S1#show running-config Building configuration... Current configuration : 1638 bytes ! version 16.3.2 no service timestamps log datetime ...
3
votes
1answer
86 views

What does it mean when default route is to a network address?

The default route as configured in a Cisco router is as shown below: Gateway of last resort is 103.0.0.0 to network 0.0.0.0 What I have came across so far is that the gateway of last resort is ...
0
votes
1answer
40 views

Why I can't ping my switch Vlan99?

In the following network, I have configured every device but somehow I can't ping my Customer-PC and Technical-PC to PasirGudang-SW and Segamat-SW. The PCs can ping the other ip address just fine ...
1
vote
4answers
92 views

If router is a layer 3 device how can it have an application interface (GUI)?

It is said that layer 3 devices such as routers do not have an application layer. But whenever I want to configure my home router I punch in the IP address and open up its graphical user interface. ...
0
votes
1answer
57 views

BGP route advertised but cannot Ping

I have this rather basic setup with 3 routers running BGP, each has Loopback int configured. Is there an extra step required for R2 to ping R4 Loopback interface despite it's being advertised? R2#sh ...
0
votes
3answers
53 views

BGP-OSPF route injection doesn't work

Background: BGP is fully functional and works as expected so nothing need to worry about, the problem is the route injection between HK_Office <> HK2 and LON1 <> LON_Office, as you could ...
1
vote
0answers
15 views

DATA & VOICE VLAN ROUTING BETWEEN 2 ROUTERS [closed]

Good Afternoon All- I would appreciate a little help with a current issue I am facing... I can ping all Network Segments, all Routers, all Switches, and all Servers on the network. PROBLEM IS: I CAN'T ...
2
votes
3answers
262 views

If router operate at network layer, how does router change data-link header and trailer between data-link header and trailer between LAN and WAN?

Refer to figure 6-9, the CCNA Official Cert Guide 200-301 Volume 1 illustrates that, to send a frame through WAN, router R1 changes frame header and trailer. However, as router operate at network ...
2
votes
1answer
37 views

What is difference between Route object and AS-SET object in RIRs?

In what case,we need to create AS-SET objects in RIRs. If i have to advertise a prefix from different ASNs in different region,do I need to create as-set object?
0
votes
2answers
28 views

Is packet transfer still possible, if the routers don't have the updated link cost information in the Bellman-Ford Algorithm?

In the Bellman-Ford Algorithm, the principle of "Good news travels fast but bad news travels slow" is implemented. So if the cost of the link between two routers is increased, then the ...
0
votes
2answers
27 views

Concurrent site-to-site VPN tunnels through dual ISPs (with 2 couples of Cisco ASA) between same devices

I currently have a simple site-to-site VPN setup, connecting machines from site 1 to site 2 through 1 ISP, using a set of ASA 5506X. All is good. I'd like to "double" that setup for ...
0
votes
2answers
62 views

Why are ISPs arranged in hierarchies?

ISPs are organised in a hierarchy where the Tier 3 ISPs are connected to Tier 2, and Tier 2 ISPs are connected to Tier 1 ISPs. Why are they organised in a hierarchy? Is it because if all devices were ...
0
votes
1answer
28 views

Why does GRE tunnel has lesser TxBS/RxBS than its physical interface?

Given for instance, interface Tunnel200 tunnel destination 110.153.1.1 There's a static route for 110.153.1.1, pointing to physical interface Gi0/0. Gi0/0 is only used for tunnel200. Under show ...
0
votes
1answer
88 views

How do I apply an access list on a switch?

I'm configuring a very small network on packet tracer 8.0 and I have a single 2960-24TT switch which is connected to 2 PCs and 1 router. Everything is on the 24.17.2.0/24 network and I added a VLAN. I ...
0
votes
1answer
55 views

How to connect to different VLANs through VPN

I have the following setup: I have setup a Layer 3 Switch with multiple VLANs Multiple devices are connected to it on different VLANs via untagged access ports There is also a router connected to the ...
0
votes
1answer
63 views

Forward Avahi mDNS packets from one network to another [closed]

I have a Linux device connected to two different networks. eth0 is connected to 198.18.248.x and wlan0 is connected to 198.19.255.x. Another device connected to the 198.18.248.x network and it's ...
0
votes
1answer
42 views

How routers route packets to a specific network

As I understand it, routers route packets to a specific network based on network id and of course the network id must be unique on the Internet, now the question is: maybe there are billions of ...
1
vote
3answers
54 views

Why do IP(v6) routes require a next hop IP(v6) address and not just a MAC Address?

My understanding of how you "ask" a router to route a packet for you is that you simply put the IP(v6) address of the destination host and the MAC address of the router you are routing via ...
0
votes
1answer
59 views

Design question: VLANS or Routed interfaces over dark fiber between sites seperated by 10s of km

Production network design idea: 7 sites total. Each site has an HP Procurve core switch. Each switch has at least 2-10G dark fiber connections to other sites. A few links are under 40km, the remaining ...
0
votes
3answers
79 views

How are MPLS routers connected to each other?

So MPLS is one of the many ways to connect two or more distant sites. In other words, it is some kind of a "WAN solution". But what is the "WAN solution" for MPLS? Take for example ...
3
votes
3answers
481 views

Multihoming with two 'good' providers - load sharing strategy?

We get two 100G links, one from each provider and our aggregate traffic is sub 100G. The rationale is one provider can fail and the other will pick up the slack with zero degradation. Our traffic ...

1
2 3 4 5
40