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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JUNIPER EX-2200-C Layer 3 Switch Configuration

I am setting up attempting to simulate a small infrastructure of Clients and Servers. Current Setup 1x. Dell Inspiron Tower Running ESXI 6.5 1x. HP Z800 Workstation Running ESXI 6.5 1x. Juniper ...
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why does not the Internet require a single routing protocol for all stand-alone systems?

why we are not using one routing protocol like OSPF for example for all autonumus systems.
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How to firewall choose routing through ospf?

enter image description here i have this case:on firewall 1 and firewall 2 configure routing ospf and vrrp in the same time traffic go to internet through firewall 1, from firewall 1 routing to ...
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2answers
63 views

Sending an ipv4 packet to the Destination IP without a router?

We are replacing a "RF modem + Router system" with a Software Defined Receiver. After analyzing the receiving and sent signals we found out that an IPv4 UDP packets have been sent and received. The ...
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1answer
45 views

Inter VLAN routing Issue with 4G connection

We have new branch and we will connect it through 4G routers "WAN connection" and L3 switches as below Fig. From 1-Branch Switch i can ping the 2-Branch Switch, but from (PC-1) i cannot ping (2-...
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2answers
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Does anycast addressing add additional latency in any way?

Does anycast addressing, in itself, add any additional latency to network connections? Specifically, if you had two servers located in the same data center that had extremely similar routes/number of ...
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3answers
421 views

How to add multiple ip address in destination ip in acl rule

Iam trying to block a certain host from sending any message to any host in the network is there is a way to do that or i have to deny host by host ?
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1answer
87 views

BGP | Advertise a summary prefix out to customer location

I don't know what I should be using for this or how I should go about it. In my lab where I am testing out the BGP configs that I've learned I want my ISP topology to have a summary prefix for the ...
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1answer
281 views

RDP on IPV6 using DS-Lite-Tunnel [closed]

I am trying to access one of my PCs from and external network using RDP on port 3389. After realizing my ISP uses DS-Lite-Tunnel I gave up ipv4 and focusing on ipv6. So far the only way I managed ...
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1answer
110 views

Static routing using 2 routers and 1 multi-layered switch

I'm trying to configure a static route between two routers and a layer 3 switch as follows - Router 0 interface FastEthernet0/0 ip address 172.17.10.1 255.255.255.252 duplex auto speed auto ! ...
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2answers
89 views

Why can't we have duplicated IPs?

This may be a really dumb question, but I like to turn upside down what I already know sometimes, that way I can learn more. For example, given a network 192.168.0.0/24, I have a device inside with ...
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1answer
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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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2answers
103 views

How to ping router from L3 switch

I am stuck in that that switch can't ping router and router can't ping switch. How to fix that ? I tried so much variants but them didn't help me Actually router must do static routing, that i am ...
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2answers
211 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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2answers
466 views

Traceroute showing inter-vlan routing?

I currently have two different devices (one server and one client device) that are on separate VLANs (VLAN 5 and VLAN 10 respectively). When the client device runs a tracert to the server, the tracert ...
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1answer
80 views

Internet speed across access points

Hi I work for a small plant nursery that is split into two parts by a street. The main side of the nursery has the majority of the green houses. There is a main switch in the office and from there we ...
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2answers
278 views

BGP multi-path using loopback

I have above scenario where i have multiple PATH for my BGP so i have to setup loopback interface to make it ECMP routing on both path. I have cisco nexus switches and following is my first router ...
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2answers
906 views

BGP convergence issue

I have 2 different carriers on my Cisco 2921 router and I have set weight to 350 for my first carrier to force it for my outbound traffic, and I set second carrier weight to 300. I am receiving BGP ...
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4answers
171 views

Carving out a /28 network and still maintaining access to parent /24 network

In the diagram below, I'd like to carve out a /28 network from 192.168.0.0/24 and move it to another geographical location and still maintain access in and out of the original /24 network. ...
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1answer
55 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
44 views

Purpose of prune message in rpf

I read that when a multicast aware router without receivers received a multicast message, the router will send an upstream prune message. I don't understand what is the purpose of the prune message. I ...
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0answers
51 views

How to get traffic to take BGP route if not matched in PBR? [closed]

I am a newbie to BGP and have an ASR1001x router (172.16.0.3), I'm forwarding an ACL to a second router (172.16.0.1) while I try to get BGP working on this one for a specific testing prefix-list ...
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2answers
218 views

Hub-Spoke communication with BGP

I'm trying to establish connectivity between Hub and Spoke locations of same enterprise with same AS using BGP. Within DC (hub) iBGP and OSPF is used and eBGP is established between Spokes and MPLS ...
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0answers
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IS-IS as a PE-CE routing protocol [closed]

In case of IS-IS as a PE-CE routing protocol for MPLS VPNs , when route is redistributed from BGP to IS-IS , does 'Down Bit' is also set to avoid routing loops?. Background Information We know that ...
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2answers
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is it ideal for a network that abandon the use of L2 switch?

I'm thinking about minimizing network hardware while optimizing network topology for company. If a company has unlimited(or very high) budget to build an ideal network for internal use(traditional ...
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2answers
288 views

Connection between two networks with different IPs and identical subnets?

How can we establish communication between two networks with different IPs but same Subnets? Network Connection 1: (Factory Network for machinery) I.P = 192.168.19.X S.N = 255.255.255.0 G.W = 0.0.0.0 ...
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2answers
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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
457 views

Do unmanaged switches honour QoS priorities set by managed switches?

Details about the devices We have a 24 port NETGEAR managed POE switch that has QoS capabilities. We also have the following unmanaged switches, 24 port Cisco POE, 48 port Cisco, 48 port NETGEAR, and ...
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2answers
1k views

OSPF increase bandwidth with load-balancing

This is my current setup where i have 40Gbps links between all 4 switches running OSPF using L3 links between them but now i want to double my bandwidth between switches so i am planning to add (...
2
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1answer
51 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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1answer
90 views

Connecting networks from different states [closed]

Is it possible to connect 5 networks together using one router as a central component even if the networks aren't close to each other? An example would be 2 networks in Houston and 1 in Dallas Texas, ...
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3answers
1k views

RIP Packet Format

I am trying to investigate a RIP packet. It clearly states that the packet is RIP v1. But its format does not match with the either RIP v1 or v2. Any ideas what this packet actually is?
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2answers
560 views

No route to host for IPs in same subnet being routed by bgp

I have set up BGP to do some custom routing for a subset of addresses in the range 192.168.1.0/24. I have verified that the BGP is working by testing ping/curl on a different host in a different ...
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2answers
268 views

Running iBGP without IGP

Given following setup: Configuration of the routers is very straight forward. Router BGP1: interface Loopback0 ip address 1.1.1.1 255.255.255.255 ! interface Loopback9 ip address 9.9.9.9 255.255....
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2answers
178 views

How to architect a globally distributed website, from an IP address perspective

I would like to have a website that is loaded fast from any point in the world. From my understanding, you need to take advantage of the data center "regions" at places like Google Cloud or AWS. That'...
2
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0answers
52 views

RPL: questions on routing mechanism

I'm studying RPL and two questions came to my mind: 1: Both in storing and non-storing modes, if a node wants to send a packet to another node via P2P communication paradigm, then how does the ...
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1answer
391 views

How to change AD on Juniper router?

I have this route on my Juniper Router and some destinations have two routes: OSPF and BGP. I want to change the administrative distance for the BGP route so that it will be smaller than the OSPF ...
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2answers
278 views

How does pfSense control network traffic when plugged into a switch? [closed]

I apologize for this n00b question, but I'm trying to learn networking to help at a non-profit where the old IT guy is no longer there. They have several Cisco switches and one pfSense instance that ...
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1answer
114 views

Public and Private IPs

I wondered if someone could explain this to me. At work we have a firewall that connects to the Internet and has an external IP configured on it via DHCP. The firewall's WAN port connects to an ...
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1answer
73 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 ...
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1answer
332 views

What happens in Exstart state in OSPF neighbor state? Will DBDs be exchanged in that state?

According to my knowledge, DBD exchange happens in Exchange state.
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1answer
64 views

Installing a redundant system in parallel routing

I have a legacy automation system which will be replaced by a newer version. As an fallback option, the new system will be installed in parallel to the old one. But only one will be "in control". Due ...
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1answer
57 views

Routing in Wireless Ad-Hoc Networks

Let's say I have a mesh of sensors forming a wireless ad-hoc network. If one sensor wants to send data to the sink, it will transmit a packet via WiFi for example. My assumption is that there's no ...
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3answers
229 views

Why do all the intermediary routers need to run iBGP without tunneling?

I'm trying to understand the configuration behind iBGP - I understand you can run full mesh to prevent loops, run confederation or route reflectors, if you don't want full mesh, else run tunneling ...
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2answers
50 views

Can you tell whether a device is a gateway or not from its routing table?

When looking at a device's routing table, can you tell whether it is a gateway device between some networks or if it is not a gateway device?
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2answers
117 views

Finding a lost device

I have a device - an old printer I think - that is showing up in my traffic flows. It is from a decommissioned subnet (100.100.100.0/24). It is passing one of my network taps and triggering alerts. ...
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1answer
56 views

Is “gateway” a concept between two or more networks or a concept belonging to just one network?

Is "gateway" a concept between two or more networks or a concept belonging to just one network? When a device is connected to two networks, if it is listed as gateway in the routing tables of the ...
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3answers
187 views

Do all network devices need to make routing decisions, regardless of communication across networks or within a network?

From Hunt's TCP/IP Network Adminstration: Gateways route data between networks, but all network devices, hosts as well as gateways, must make routing decisions. Is it correct that routing ...
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4answers
102 views

Does a gateway need to be designated?

Does a gateway need to be designated? I thought a gateway between two networks is a device explicitly designated to be a gateway, out of several qualified devices connected to both networks. That ...
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1answer
112 views

Unable to Ping Past Firewall

I am trying to get communication across a firewall, but I am unable to ping anything past the firewall. PC1:172.16.201.22 <-> Router:172.16.192.1 <-> Firewall_Port1:10.10.10.4 <-> ...

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