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
0 answers
44 views

intervlan routing on cisco L3 stacked switches

I am new to this and I am having a bit of a issue trying to successfully perform intervlan routing on a stacked L3 switche(s). I essentially have three SVIs with their corresponding VLANS ( i think) ...
Tormentium's user avatar
0 votes
0 answers
18 views

DOUBT THAT I WANT TO UNDERSTAND [closed]

"Imagine I’m uploading a video to the internet. As the file starts to send from my computer, I’m wondering: When exactly does the 5Mbps upload speed my internet provider promises kick in? Is this ...
Luis Polanco's user avatar
-1 votes
1 answer
52 views

Why MLS2 Doesn't Get ICMP Packet To Where It Should?

This is a Packet Tracer lab from Kieth Barker's website with minor modifications. It is intended to exhibit how can we get to the network 10.10.0.0/24 access to the Web Server 23.1.2.2/24 Using NAT. ...
Shadi's user avatar
  • 285
0 votes
2 answers
63 views

One Shop, Two ISPs. Will this work?

My retail shop uses Comcast Cable (calling it CC going forward) as the ISP. I just added Verizon 5G Business internet (calling it VZ going forward) as the backup for the times when CC is down (which ...
RA2024's user avatar
  • 1
6 votes
3 answers
658 views

Can ARP tables store addresses for other networks?

This is perhaps a weird question, but I'm in a weird situation where I want to route traffic from network A 192.168.1.0/24 to network B 192.168.2.0/24 via 192.168.1.5 (the address of B-router in the A ...
TrisT's user avatar
  • 163
1 vote
1 answer
54 views

Cisco BGP RTBH in EVPN fabric

I have Cisco basic EVPN fabric configuration in DC with two spine and couple of leafs using OSFP+iBGP for underlay fabric. My border leaf connected to my ISP using Vrf CUST. I want to configure RTBH ...
Satish's user avatar
  • 4,379
1 vote
1 answer
56 views

iBGP exchange all routes?

1.1.1.0/24 1.1.1.0/24 [community 100:1] [community: 200:1] [as path 100 300 500] [as path 200 500] eBGP peer (AS100) eBGP peer (AS200) \ / \ ...
krdx's user avatar
  • 141
0 votes
0 answers
10 views

answer code block juniper table routage [duplicate]

want some one expert juniper help me for this question user@router> show route 192.168.100.2 inet.O: 15 destinations, 17 routes (15 active, 0 holddown, 0 hidden) Limit/Threshold: 1048576/1048576 ...
Marghli Dhikra's user avatar
1 vote
2 answers
69 views

STP related question

Hi this is a portion of my current set up.. All vlan ports are untagged. Everything works and communicates fine until a connection is made between the 2 switches it takes down the network and the pc ...
Blake's user avatar
  • 13
1 vote
0 answers
50 views

Trouble configuring BGP policy 'next-hop self' in JunOS

Networking Community, Problem: I am struggling with applying the correct BGP “next-hop self” policies in JunOS. Background: I have been brushing up setting BGP policies, e.g. ‘direct’, ‘next-hop self’,...
dynamicruss's user avatar
-1 votes
1 answer
48 views

Why is there overlap with two interfaces?

I am trying to configure router0, I assigned ip 192.168.26.1 to gigabitEthernet 0/0 and I tried to assign this ip: 192.168.26.33 to interface serial 0/0/0 but this error appears: 192.168.26.0 overlaps ...
mohdh34m's user avatar
0 votes
1 answer
78 views

Static route weird behaviour

Hi, I am working with 4 routers: A B, P and C A and B have a P router between them that has an ospf neighborship with both. B is directly connected to router C. There's no routing protocol between B ...
V Dp's user avatar
  • 21
0 votes
1 answer
30 views

Public wifi router conflicts with company VPN IP address [closed]

I'm a digital nomad and I like to work in cafes and co-working spaces. The problem is that sometimes the network router IP address conflicts with my company's VPN-client IP address. Any and all ...
Nick Bonilla's user avatar
0 votes
1 answer
42 views

How to access SVI from the other side of a tunnel? [closed]

With two vlans separated by an IPSec tunnel, I'm having issues reaching an SVI on the far end. Hosts on either end can ping each other without issue, but the SVI's do not respond from the far end, ...
chrismec's user avatar
2 votes
1 answer
135 views

which protocol is invoked first by routers ? routing (routing table) or ARP?

I have a question regarding the internet layer of the TCP/IP model: When a data frame is sent by a client to a server located on another network, we know that the routing tables and the ARP protocol ...
Ali's user avatar
  • 33
1 vote
2 answers
102 views

Can the Cisco SF302-08 switch support IP routing capabilities?

I'm currently working on configuring inter-VLAN routing on a Cisco SF302-08 switch. I've already enabled Layer 3 routing, created the VLANs, assigned them to switchports, and configured the switch ...
mema's user avatar
  • 11
2 votes
2 answers
66 views

what information needs a router to make a decision?

How does a router that receives a packet know what to do if it doesn’t know the subnet mask of the IP that sent the packet? The reason for asking this is that I didn't see any field in the IP header ...
netuser2024's user avatar
1 vote
1 answer
55 views

Why will specifying the outgoing physical interface work for a static route with IPv4 and not for IPv6?

When setting up loopback interfaces with IPv6 addresses with static routes between two directly connected routers through their interfaces. It does not work to specify it with the outgoing physical ...
Calvin Broadus's user avatar
0 votes
2 answers
57 views

IPv4 Address space for PTP links

I operate a relatively small ISP (around 1k households). We have passed the stage where a single router does not cut it anymore. As a corollary, we have to link routers to each other. For this, we've ...
Aloha's user avatar
  • 103
0 votes
1 answer
100 views

In a trace route, do routers that do not respond still forward the packets?

In traceroute, The sender expects a reply within a specified number of seconds. If a packet is not acknowledged within the expected interval, an asterisk is displayed. Pasting here the example trace ...
Noob_Guy's user avatar
  • 481
0 votes
1 answer
81 views

Problems with twice-NAT on Cisco 3548

I'm trying to get Twice-NAT working on a Cisco 3548 switch. I have a VRF set up with 2 L3 ports on it - Eth1/33 has ip address 20.20.255.250/16 and is nat inside Eth1/34 has ip address 10.10.1.211/24 ...
Kevin's user avatar
  • 101
0 votes
1 answer
64 views

Can't ping between cabled interfaces on different VRFs on same switch (Cisco 3548)

As an experiment I've created a non-default VRF, directly cabled between an L3 port on the default VRF and an L3 port on the non-default VRF, and am trying to ping between them. Neither interface can ...
Kevin's user avatar
  • 101
0 votes
1 answer
102 views

Two switches connected to VyOS router - nodes connected to the second switch can't send or receive packets

I'm using VyOS 1.1.8. I am having following set up in GNS3: Devices connected to Switch1 are working properly. PC1 can ping PC3 and vice versa. They can obtain IP via DHCP. PC2 can't be pinged even ...
Chicken McNugget's user avatar
1 vote
2 answers
200 views

what is the purpose of GRE in UDP encapsulation if its unidirectional

I was going through this feature of GRE called GRE-in-UDP encapsulation. The RFC says it is unidirectional and the tunnel traffic is not expected to be returned back to the UDP source port values used ...
RootPhoenix's user avatar
1 vote
1 answer
72 views

BGP: Are Virtual Internet Exchanges more efficient than normal internet transit?

There are a number of virtual internet exchanges that BGP peer over VPN links when local presence is not available. Given the IP encapsulation overhead, and the fact that these routes still cross the ...
KJ7LNW's user avatar
  • 167
0 votes
1 answer
38 views

Is route from traceroute guaranteed to match the route packets will take in actual usecase?

Context I'm working on a university project where I need to find out if it's possible to save electricity by hosting services locally and thus having to transmit data by smaller distances. I've ...
mcv_dev's user avatar
  • 103
0 votes
1 answer
59 views

Rip Routing Protocol

RIP routing protocol use the distance vector routing algorithm that mean each router will share the distance information,But how can this distance information help the router to know where to forward ...
Darevil294's user avatar
0 votes
1 answer
65 views

How can I have multiple servers and IPs if I only have 1 ip with gigabit connection?

I have 1 gigabit connection with static public IP address... Without depending on my local ISPs colaboration, is it possible to buy IPs from an online service and route each individual IP to my local ...
adrianTNT's user avatar
  • 101
0 votes
1 answer
74 views

OSFP anycast route different area

So.. lets pretend i need to advertise a route in anycast to the backbone, obviusly same route that in this case is 192.168.1.111 . Can be a problem if the routers that advertise that route to the ...
d0x0p's user avatar
  • 1
1 vote
1 answer
233 views

How can I implement BGP between two routers that have already been configured with different routing protocols?

I have two different AS with different IP ranges and subnets, and the first router stack is running RIP, and the second one is OSPF. I want to configure BGP between "Router-PT Router23" and &...
zeel's user avatar
  • 11
-1 votes
1 answer
39 views

ISP ARP tables and routing [closed]

So I'm Network+ certified and have a beginners understanding of how network communication works, my head starts to split a bit though when I think about how the information is actually communicated ...
user1047228's user avatar
1 vote
1 answer
237 views

Who/What is AS4100000000?

I have seen AS4100000000 in some routing datasets I am working with, for example Routeviews: 194.153.134.0/24 AS4100000000 I would like to understand where it is coming from or who controls it so I ...
fjahr's user avatar
  • 123
0 votes
1 answer
46 views

2 Routers for PPPoE and NAT 5 Public IP [closed]

My ISP have provided me with 5 Public IPs. I tried to NAT these 5 IPs to our local server by using this setup. The primary router will be setup for the internet connection while the one-to-one NAT of ...
Renivle's user avatar
0 votes
2 answers
195 views

If the destination MAC is changed every hop. When it arrives at the destination router, how will it know which device to deliver the packet to?

I learned that inside a packet there is information about the sender's public IP and MAC and the receiver's public IP and MAC, and that at each hop, the sender's and receiver's MAC are changed along ...
Brasley's user avatar
0 votes
1 answer
85 views

Networking across campus with multiple ISPs

I currently have a campus that gets service from two ISP's that are each connected to their own router. The ISP's ingress and their routers are in different buildings on the campus. The buildings are ...
MRR's user avatar
  • 1
0 votes
1 answer
70 views

Geolocation specific ASN

question: is it possible to determine the geolocation of a city/region of a specific ASN? For example, Telecom Italia has many ASNs. Is it possible to know for each one "which soil" they ...
vincenzogianfelice's user avatar
2 votes
2 answers
690 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
  • 23
0 votes
0 answers
36 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
49 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
644 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
84 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
59 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
0 votes
0 answers
55 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
  • 803
0 votes
1 answer
54 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
393 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
145 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
41 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
83 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
79 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
143 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

1
2 3 4 5
44