All Questions
11 questions
0
votes
1
answer
120
views
why does "show arp" on my Juniper EX3400 return empty?
JunOS version is 20.2R3.9.
For instance:
root@CLEANROOM-IDF-D8> show arp interface ge-0/0/4.0
{master:0}
root@CLEANROOM-IDF-D8>
...what gives? There is a device on that port and it's working, ...
- 3
2
votes
1
answer
325
views
ARP and MAC address table
i know that this might be a little academic, but i was wondering.
let's assume we have an empty ARP table, and empty MAC Table.
let's assume PC A want to send a packet to PC B.
is the broadcast frame ...
- 23
0
votes
1
answer
243
views
IP datagram route through a network utilizing ARP
Suppose I want to send an IP datagram from node D to node C . Each step I also want to list the MAC addresses of the source and the destination , as well as the source and the destination of the IP ...
0
votes
0
answers
24
views
MAC flooding for new host in L2 domain [duplicate]
This hypothetical network has one dumb L2 switch and two hosts A and B connected to it. CAM table entries on the switch are all populated and both hosts have ARP entries for each other.
Now if a ...
3
votes
1
answer
49
views
Why the ARP packet contains values like "Physical Address length" etc?
From what i know,MAC addresses are made of 48 bits,while IPv4 addresses are 32 bits
Why are there these header fields?
Are there MAC addresses with more or less 48 bits?
- 337
3
votes
1
answer
442
views
To what address does ARP reply in the presence of MAC masquerading
The ARP packet has a duplicate of the sender/destination hardware address. Theoretically, you could have a case where a device sent
Layer2: From AA:BB:CC:DD:EE:FF To FF:FF:FF:FF:FF:FF
Layer3: ARP ...
- 133
1
vote
2
answers
2k
views
Sending packet through LAN cable to another PC having ip of another network
What happens if, say PC A(192.168.2.2) tries to send a packet to PC B(10.0.2.3) connected through LAN(only 2 computers are connected in this case PC A and PC B) as there is no router or a switch ...
- 405
1
vote
0
answers
330
views
Cisco Asr1001 not able to receive 2048 macs (arps) in a sub-interface
I´m Brasilian, so excuse me any gramar error.
I have a cisco router ASR1001 (IOS XE Version: 03.08.01.S) and I need to connect it to a service provider running BGP ipv4.
This service provider gave me ...
- 11
0
votes
3
answers
3k
views
Why do we have to connect through a default gateway in a LAN?
I'm a beginner in networking and I'm looking for answers for these questions:
Why do we have to connect through a default gateway when we are connected to a LAN and want to connect to another devices ...
3
votes
1
answer
158
views
Switches - help me to understand please
If a PC wants to send to another PC through a switch and does not
know its MAC address, that means all PCs on network will receive it
and see it!!
If we change the NIC for a PC in the network, how ...
- 430
3
votes
4
answers
21k
views
when will an arp table be updated
Will a device's arp table be updated only upon receiving a reply from a previously sent out arp request, or will it be updated if the device receives a frame/packet ?
e.g.
A send a arp request to B
B ...
- 539