Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

0
votes
0answers
7 views

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

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 ...
0
votes
0answers
12 views

What would be the router's gateway IP address that is connected to a network containing two smaller networks [duplicate]

Assuming that we can use any available public address, we have two separate subnet masks 255.254.0.0 which contains 131,070 usable addresses (IP range 126.240.0.1-126.241.255.254) and 255.255.128.0 ...
1
vote
1answer
77 views

Replacing IP address of connections from AWS towards SIP

We have installed a PBX on AWS and connected it to our on-prem Router via VPN. My on-prem router is connected to the SIP provider via a physical connection with another on-prem MUX device (device ...
2
votes
2answers
45 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 ...
-1
votes
0answers
11 views

How to calculate the free bandwidth scope and re-routing the packet in the network MPLS Using OMNET++ with an INET project? [on hold]

I want to know, How to calculate the free bandwidth scope in the MPLS network Using OMNET++ with an INET project? How to re-routing the packet in the MPLS network Using OMNET++ with an INET project?
1
vote
0answers
18 views

IS-IS as a PE-CE routing protocol

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 ...
0
votes
0answers
24 views

Site not accessible through public IP from intranet [closed]

I'm hosting some sites/services like Jenkins on a server I've got at home. I'd like to have them accessible from the Internet as well as intranet through a public domain name. For this I've registered ...
-2
votes
2answers
58 views

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 ...
1
vote
1answer
863 views

Sonicwall TZ105 Site to Site VPN Created can ping gateways but can't ping network from other site

Need help here Site B TZ105 x0 Lan 192.168.162.1 X1 WAN 64.x.x.x X2 LAN 10.0.3.1 Site A TZ300 X0 LAN 10.0.1.1 X1 WAN 69.x.x.x VPN tunnel set up as VPN SITE TO SITE and is Green From Site A I can ...
1
vote
3answers
1k views

Juniper EX how to clear route forwarding table?

After layer 3 routing a large IPv6 assignment on an EX Juniper switch, the route forwarding table filled up and some entries corrupted or became otherwise invalid. We want to clear the whole table. ...
0
votes
2answers
39 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 ...
0
votes
1answer
142 views

How ARIN IP Address is used in APNIC Region? [closed]

Amazon AWS provides the following JSON (Source) which has list of IP Address ranges used by AWS. { "ip_prefix": "54.179.0.0/16", "region": "ap-southeast-1", "service": "EC2" ...
0
votes
0answers
18 views

How to do IP masquerading on MacOS (10.14+)? [closed]

I am looking for the equivalent Macos command to the linux: sudo iptables -t nat -A POSTROUTING -o en0 -j MASQUERADE The reason i want to do this is I have a VPN that has the default route, but i ...
0
votes
1answer
28 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 ...
1
vote
0answers
19 views

routing with multiple NICs (connected to multiple APs) that were all assigned the same LAN address [closed]

I have 4 wireless APs based on the ESP8266. These APs all broadcast distinct SSIDs, but each serves LAN addresses in subnet 192.168.4.XXX. The subnet value is not configurable. Then, I have a Linux ...
2
votes
1answer
58 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, ...
2
votes
2answers
76 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....
0
votes
0answers
37 views

How to route a specific users IP from WAN to a specific host IP on a subnet OPT1 (pfsense)

I host a game server, Players and Devs use the same launcher/client that has hard coded ports (5555) that cannot be changed. (No Configuration Files) How would I route Devs to the Development Server [...
7
votes
2answers
433 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
votes
3answers
146 views

How data is routed from one landing point to another on submarine cables?

On submarine optical cables with one trunk and several landing points, how does data that leaves one landing point be routed to a desired destination at another landing point? I have many hypotheses: -...
4
votes
1answer
1k views

pfSense Site-to-Site routes

I was presented with an issue regarding an actual setup using pfSense at two locations. pfSense Site A is the OpenVPN Server and B is the client. Everything works, the LAN on Site A can communicate ...
11
votes
2answers
3k views

Why is RIP not scalable?

Most of the references say "RIP is not scalable" hence can be used only in smaller networks. But none say "WHY?" What is that in RIP that actually preventing it from scaling to larger networks? And ...
10
votes
2answers
4k views

Why does the MTU need to match on interior link state routing protocols like EIGRP and OSPF?

If one tries to configure the neighbor adjacencys without matching MTU, The routers fail to become neighbors. I assume this is to protect the routing protocol from it self but I don't understand ...
2
votes
1answer
28 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 ...
4
votes
3answers
154 views

Inter-VLAN Routing Issue

As you can see in below diagram regarding the Inter-VLAN between Server (VLAN 107) with The site in (VLAN 104)actually, we can ping all the inter-VLAN on the site. but we cannot browse some of them ...
2
votes
1answer
416 views

GNS3: No Response When Pinging Router Connected on Second Serial Interface

I'm attempting to set up a network with 3 Routers. A "West" and "East" router are each connected to a "Central" router via a PA-4T+ serial interface. The first interface (s1/0) on the Central is ...
0
votes
0answers
10 views

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?
3
votes
2answers
94 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. ...
1
vote
1answer
67 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 <-> ...
1
vote
1answer
43 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, ...
2
votes
1answer
761 views

Problem in routing the network in GNS3

Can someone please help me: Cloud 5 is configured with a loopback adapter on my PC with ip 10.84.104.254. R1 F0/1: 10.84.104.1 i am able to ping R1 F0/1 from outside, as well as I can ping and do ...
4
votes
3answers
970 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?
2
votes
2answers
84 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 ...
2
votes
2answers
1k views

IGMP and multicast forwarding

So my question is, will using IGMP alone(without IGMP snooping, PIM...etc) making router forwarding multicast traffic? I'm working on a buggy switch, but I don't know about networking too, so I'm ...
2
votes
5answers
26k views

How can 2 computers in different network communicate?

Suppose my friend and I are connected to the Internet via some local ISP (not necessarily same), which means we are on different networks, hence our computers have different private IP addresses. Is ...
5
votes
2answers
146 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'...
0
votes
1answer
50 views

Cisco ASA not passing traffic between two interface

I have Cisco 5506 with Security Plue License and following is my configuration. interface GigabitEthernet1/1 nameif inside security-level 100 ip address 10.0.10.1 255.255.255.0 ! interface ...
0
votes
0answers
8 views

Given an IP address and a subet mask, how do I find the max number of subnets and usable host IP's? [duplicate]

my question is based on an IP address and a subnet, how can I find the maximum number of subnets and the number of usable host IP address per subnet. This is all IPv4 if that helps. For example if I ...
3
votes
2answers
6k views

SonicWALL routing and L2 VLANs

We have a SonicWALL NSA 3500, x4 has 2 VLAN interfaces so x4:v300 and x4:v301. Each VLAN has an IP address: v300 is 192.168.100.1, and v301 is 192.168.101.1. I then have x4 connected to a layer-2-...
0
votes
1answer
59 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 ...
3
votes
1answer
483 views

ISP's Customer wants to pass iBGP for his private IP addresses inside his WAN?

Customer has internal networks 10.0.0.0/16, 192.168.0.0/16. Has a network of VPN tunnels, an AT&T MPLS network, and a few Internet (public IP links) from me. I maintain an eBGP AS. He wants to ...
0
votes
2answers
501 views

SG300 Load balancing / distribution configuration

I have a SG300-28p switch I want to connect 18 devices, but want to balance or distribute evenly the traffic between groups of six ports (1-6, 7-12, 13-18). I was hoping to have DHCP enabled for all ...
3
votes
1answer
416 views

Bird BGP routing to iBGP router with prefix segmentation from /22 to four /24

First of all, I am a newbie to Bird and BGP routing. My question is, how can a router route traffic towards a lower router and segment from a one /22 prefix to four /24 prefixes? I tried to setup a ...
2
votes
0answers
49 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 ...
3
votes
1answer
77 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 ...
0
votes
1answer
61 views
1
vote
2answers
46 views

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

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 ...
1
vote
1answer
68 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 ...
1
vote
1answer
58 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 ...
8
votes
3answers
3k views

How are MAC/IP addresses used in routing

I have to teach my sixth form about MAC Addresses and IP Addresses in a few weeks time and there are some areas I am unclear on which I am hoping some of you will be able to clarify for me. I have ...