Skip to main content

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
2 votes
2 answers
789 views

Can LACP connect to 2 different firewalls?

I'm in the process of redesigning my network and have a few questions about LACP configuration: Can LACP be set up to connect to two different firewalls? In the diagram I provided, there are three ...
kevin's user avatar
  • 33
0 votes
0 answers
44 views

2 Cisco ASA Firewalls - TCP SYN FLOOD

Problem We have 2 firewalls, a DMZ firewall and another firewall named FW1 in a testlab. Both are CISCO ASAs. The shared services and jumphost are behind the FW1 firewall. The 172.28.208.0/24 subnets ...
Kal's user avatar
  • 1
1 vote
1 answer
57 views

Import route from one rip group to another

Just started out with RIP implementation in juniper routers. Was not able to find much info on the following points. Any help is appreciated. I have defined 2 RIP groups, both in the same routing ...
host_unreachable's user avatar
4 votes
2 answers
698 views

must an IPv6 router have an IP address in the SLAAC prefixes it's advertising?

for example: i have a router with the lladdr fe80::1/64 on interface e0. the router is configured to advertise the autonomous, on-link prefix 2001:db8:1:1::/64 in RAs on e0. must the router have an ...
unixwitch's user avatar
1 vote
1 answer
91 views

How to configure OSPF to create desired routing paths?

Is there any way to assign OSPF cost so that when is traceroute 147.147.11.98 from R1 it goes like R1->R4->R5->R2 and when I traceroute 147.147.11.98 from R5 it goes like R5->R4->R1->...
Rakesh Kr Yadav's user avatar
1 vote
1 answer
64 views

Connecting and combining 2 networks

I have networks in 2 separate buildings. Each has its own private IP range. We're installing a private fiber link between the two buildings. Do I just need to adjust the subnet mask so they can see ...
Gary Hanna's user avatar
1 vote
2 answers
88 views

The use of VRF Lite

I have a quick question about VRF Lite. So I understand that VRF is a technology which allows the router to build multiple virtual routing tables which divide the network on L3 with each VRF table ...
Mitrixsen's user avatar
  • 877
0 votes
1 answer
76 views

What is the recommended destination public IP for Cisco IP-SLA?

I want to implement Cisco IP-SLA, but I am not sure what the destination IP I should use. Any recommendations or advice?
Ahsan Khan's user avatar
1 vote
1 answer
577 views

Explaining the entries in routing table

I would like to ask for help with explaining every particular entry in routing table. That is what I receive after calling route print in my PC, based on Windows: So my understanding is: 0.0.0.0 ...
Bratw's user avatar
  • 23
0 votes
1 answer
210 views

How do layer 2 switches route based on MAC when daisy-chained?

Trying to think about this from a hardware design perspective, if I had to design an FPGA or a uC or something to manage a single port being the gateway port and one or more switched ports for routing,...
Qix - MONICA WAS MISTREATED's user avatar
0 votes
1 answer
46 views

IPv6 subnetting with different end device requirements

`I have three main buildings with building A with 242 end devices, building B with 54 end devices and building C with 894 device. And all the routers are connected to each other like ring topology. ...
Anjil Khadka's user avatar
0 votes
0 answers
115 views

How to handle routing with overlapping ranges as general concept?

An existing network managed by a 3rd party contains routers of the same subnet (in this case 192.168.0.0/24) and is connected to a central infrastructure using a VPN tunnel. All connections are force ...
muffel's user avatar
  • 101
0 votes
1 answer
89 views

Is internal network traffic sent to private subnets via their NAT Server?

Similar to this question, I'm wondering how resources in my public subnets communicate with those in my private subnets - when there is a NAT service present. My impression is that a self-managed NAT ...
d8aninja's user avatar
  • 103
0 votes
1 answer
203 views

Can control plane and data plane be different in BGP?

I have heard that the BGP routes exchanged between the routers do not necessarily mean that the actual data path will follow the specified routes. How can the data path and control path be different ...
Shyamkkhadka's user avatar
0 votes
2 answers
63 views

Trying to achieve ECHO request reaching destination in other VLAN

I'm working in a network on packet tracer, when I'm sending ICMP requests from VLAN 20 (yellow field) to VLAN 10 (turqoise field) the packets get stuck at the switch where it is connected to. Case 2: ...
frisTent's user avatar
0 votes
1 answer
85 views

Confused about the BGP ConnectRetryTimer

I am studying about BGP adjacencies at the moment. About the Idle state. I've read from my Cisco book that errors can cause the neighbor state to revert back to Idle and the ConnectRetryTimer is set ...
Mitrixsen's user avatar
  • 877
0 votes
1 answer
448 views

Router to Wireless router (Packet Tracer)

Hi, Can anyone help why I can't ping from my pc in office network to my laptop in guest network or wireless network. It is possible to ping from guest network to office but failed vice versa. Main ...
eccentric learner's user avatar
0 votes
1 answer
97 views

Routing table routes with different administrative distance

When a router receives two routes from the same routing protocol to the same destination network, it uses the Metric to decide which one to add to the routing table, so if Metric was different it will ...
sam's user avatar
  • 15
0 votes
1 answer
248 views

Is the security of BGP using a pre-shared key dependent on the security of MD5?

The german wikipedia article to BGP states (translated): In the basic configuration, a BGP-Router is susceptible to spoofig attacks, through which the attacker can manipulate the routers. By using an ...
Stevie's user avatar
  • 103
0 votes
1 answer
70 views

Allow active connections in firewall on multiple BGP connected routers

We have a network on its own AS with 2 routers connected to 2 AS via BGP (full routes). The routers also both have a firewall on board that by default drops all traffic, except the one allowed. We ...
wimg's user avatar
  • 103
0 votes
0 answers
28 views

Routing table - Routes with heading [duplicate]

I want to know when routes headings are added ? For example: Are they added only for directly connected routes?
sam's user avatar
  • 15
1 vote
2 answers
151 views

Routing table updates Limits

When the router builds its routing table , it uses the routing updates with its neighbors , but the routers on the internet don't have entry for every other destination network on the internet right ? ...
sam's user avatar
  • 15
2 votes
1 answer
675 views

When would we want to do traffic steering?

After going over EIGRP, I ran into offset lists which allow the modification of the metric of routes advertised by EIGRP and provide the option of traffic engineering. I am not very experienced with ...
Mitrixsen's user avatar
  • 877
0 votes
0 answers
565 views

Pfsense NAT with site-to-site VPN

For a client I am building a network solution that enables them expanding their available online presence. I am running into a problem with port forwarding to an IP which is routed over an OpenVPN L3 ...
Koen Vuurens's user avatar
0 votes
1 answer
30 views

If I am connected with two network then which network will be used for communication? [closed]

First I connect with a WIFI (to get internet connectivity) and then I connect with my company's network using Pulse Secure. When I do ipconfig then I get an output something like below: C:\Users\...
hagrawal7777's user avatar
0 votes
1 answer
613 views

[Mininet/Miniedit]: Can't get the host machines connected via a router to ping each other [closed]

As a part of an experiment, my network has the following topology for two host machines connected to a router in mininet(on Ubuntu 22.04.02 Virtual Machine) h1 - r1 - h2 The host Machine 'h1' ...
Toshitt Ahuja's user avatar
3 votes
1 answer
1k views

Why do typical spine-leaf architectures have one border leaf instead of all leafs having an uplink?

In all spine leaf architecture explainers I've seen I've come across the concept of the border leaf which is used as the connection point of the entire clos network to an upstream router, be it either ...
alex's user avatar
  • 167
0 votes
1 answer
319 views

Routing in Azure subnet to on-premise and out vpn-tunnel

We are trying to establish a connection from Azure VNET(10.10.0.0/16) over S2S VPN Tunnel (VpnGw1) to on-premise network (192.168.1.0/24) and then out through sonic wall to second VPN Tunnel to ...
Jayden's user avatar
  • 103
3 votes
1 answer
253 views

Do Directly Connected Routers Need Routing Protocols For DHCP Relay To Work?

Let us say that we have R01, R02, and R03 connected to each other, and each of them is connected to a different subnet SUB01, SUB02, and SUB03, respectively. R03 is set up as a DHCP server, and DHCP ...
Shadi's user avatar
  • 285
2 votes
1 answer
399 views

Why No Ping When Use Static and RIP in This Network?

I am a learner. I learned somewhere that we could use static and dynamic routing in the network. I built the simple network shown in the attached picture. I configured router8 with static routes to ...
Shadi's user avatar
  • 285
1 vote
1 answer
122 views

VPN doesn't work

I'm trying to configure VPN between 2 routers: R1: public IP is 200.0.0.6/30 on S0/0/1, private IP are 10.0.0.0/8 and 20.0.0.0/8 R3: public IP is 210.10.0.6/30 on S0/0/0, private IP is 192.168.3.0/24 ...
Penguin's user avatar
  • 27
3 votes
1 answer
73 views

How do communication networks physically direct traffic? [closed]

I’m curious as to how this would work. I have an ISP that uses Coaxial Cable to deliver its services (this company was one of the original cable TV providers in the neighbourhood, hence why coax and ...
StackQsUp's user avatar
1 vote
1 answer
127 views

Can multiple LANs be configured to work as one when connected together? [closed]

Let's say I have multiple standalone Ethernet networks in a classic NAT configuration. The LANs can be connected together resulting in one big network. What kind of router configuration would enable ...
Duvrai's user avatar
  • 173
0 votes
2 answers
267 views

What's the reasoning behind the "Longest prefix match" algorithm?

I understand the concept and how the longest prefix match rule works. Let's say a router receives a packet destined for 192.168.100.5 and the router has the following matching routes in its routing ...
Mitrixsen's user avatar
  • 877
3 votes
1 answer
125 views

Should I be using point-to-point or broadcast if I plan on using SVIs in IS-IS on Juniper?

Apologies in advance if this is super-basic question, still learning ISIS. I'm migrating from Cisco over to Juniper in an environment where all of the switches are running EIGRP, are on a 172.31.255.0/...
user68992's user avatar
3 votes
2 answers
379 views

In router's config, why do I need to advertise the directly connected network?

I have learned that, in routing config, a router must advertise all of its networks. For example, in this topo: Router A need to network 192.168.1.1 0.0.0.255 and network 100.1.1.2 0.0.0.255 But why ...
scriptboy's user avatar
  • 131
1 vote
1 answer
102 views

Static route is not saved - Why?

I have the following configuration. On R1 I do inter-vlan routing. The problem is when I ping the serial interface of ISP1 with PC MA11 the ping packet is not returned to R1. I wanted to add a static ...
Rubus's user avatar
  • 305
1 vote
1 answer
421 views

Multiple GRE tunnels towards single host using anycast IP

I'm trying to build the following network architecture: Where clients try to connect to a backend server (e.g. SSH) by using a Public Anycast IP adddress (1.2.3.4), that routes the client to the ...
John's user avatar
  • 11
0 votes
0 answers
13 views

Routing vs Forwarding [duplicate]

What is the difference between routing and forwarding?When the network is a packet transfer network I dont see the reason for routing since forwarding a packet between nodes requires a routing ...
Volpina's user avatar
  • 101
1 vote
2 answers
893 views

Multiple hosts with same ip/subnet seperated by router possible?

Bit of a newb question but just curious if it can be done. Is it possible to have multiple hosts with the same ip/subnet (eg 10.101.30.10/24) each seperated by a layer 3 switch/router, where one of ...
Hudson Marine's user avatar
0 votes
1 answer
226 views

Tracing a route, from 127.0.0.1 through my network to 20.43.161.105

Greetings in the name of network engineering! BACKGROUND: The IPV4 network consists of the following nodes: Node 0:127.0.0.1 Node 1:10.1.1.1 Node 2:192.168.0.1 Node 3:192.168.1.1 Node 4:210.x.x.x Node ...
George Arthur Rosal-Talbot's user avatar
2 votes
2 answers
138 views

how do 2 different network communicate with each other

Suppose we have 2 networks with 3 PCs in each. As I understand, they can easily have the same IP addresses, but routers have different public IP addresses(e.g. here 158.127.10.3 and 158.127.10.4). So ...
Balora's user avatar
  • 23
1 vote
2 answers
558 views

How Network layer routing actually works in the physical world

This is my first question here, It might be a vague or off topic, I apologise in advance, but I am happy to improve it Basically I have a somewhat decent theoretical understanding of the OSI model. ...
theMyth's user avatar
  • 113
1 vote
5 answers
103 views

Are there any methods of differentiate between a single computer and a NAT router?

As far as I know, a traffic from a NAT router should appear similar to traffic from one computer with a single IP address. If you do not have any access to a network (let's say you are an ISP), can ...
jiwopene's user avatar
  • 113
0 votes
1 answer
233 views

How should edge switches have their routing configured (when there is a mgmt vlan in the mix)

I'm having trouble with a new network topology we are trying to implement onto our environment. The issue seems to be with the switches. The problem is not relevant to this question but for ...
shafuq's user avatar
  • 137
1 vote
1 answer
558 views

If your ISP already has a gateway, why do you need another gateway with NAT to come before a layer 3 switch?

Please bear in mind that I am learning and have never set up a network with routers and switches myself. Also please bear this is sort of going to be loaded question because there are multiple layers ...
itsmarziparzi's user avatar
0 votes
1 answer
180 views

Can you have multiple paths in BGP through different ASes?

In a course about networks in my university, we learnt about how in BGP routes, each AS chooses a single route to each IP prefix (though you may have multiple iBGP routes). Meaning that in the ...
snatchysquid's user avatar
1 vote
1 answer
117 views

For IPv6, How much processing delay difference between using /64 and /127 for Core network interconnection?

I've question about IPv6 routing processing delay. Lets assume we've got big Core network with huge traffic and many hops. All router's p2p interconnection addresses are used /127 network. In my ...
Ulteara's user avatar
  • 15
0 votes
1 answer
1k views

Sharing same IP address inside LAN? [duplicate]

Q: if 2 devices A and B share same ip address in LAN, can device A retrive all messages whose destination is device B? I think this depends on how the LAN is configured. If it's wireless then device A ...
Albert's user avatar
  • 1
0 votes
2 answers
2k views

connect two private network using pfsense

I have two pfenses (say p1 and p2) in two separate networks. Each has a public IP. There is an internal network on each side (say n1 and n2). I want to connect these two networks through these two ...
horny hacker's user avatar

1
2
3 4 5
44