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1500 questions
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2 answers

APIPA and LAN Broadcast Domain

I just want to know can a Local Area Network broadcast domain be operated by only relying on APIPA?
Pooja Rajput
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5 answers

Reset admin password on Fortinet FortiWiFi 60D

I've tried to log in to this device by doing the following. Default credentials username: admin password: Maintainer credentials in the FortiExplorer console interface. username: maintainer password: bcpb + serial number Holding the reset…
Nick C.
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6
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3 answers

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 like GRE or MPLS for BGP free core. However what I…
JuniorPenguin
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1 answer

What does routing an IP address mean?

From https://stackoverflow.com/a/40189197/156458 Blocking 0.0.0.0 makes no sense. In IPv4 it is never routed. What does "routing" a IP address mean? Why is it the reason that blocking 0.0.0.0 does not make sense? Thanks.
Tim
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1 answer

Can non-recursive BGP route be used to determine next-hop for recursive BGP route?

In BGP recursive scenario, the recursive route is taking an unexpected next-hop. Here is the routing table: S* 0.0.0.0/0 [10/0] via 10.10.10.1, wan B 172.16.5.0/24 [20/0] via 172.80.80.1, MPLS, 2d18h20m B 192.168.250.0/24 [20/0] via 172.16.5.1…
onlyforthis
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6
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2 answers

VLAN Interface is down, protocol is down

I have Cisco Layer 3 switch with IP routing enabled on it. I have different VLANs configured on it and its working perfectly. Now i have added another VLAN (SVI) and assigned that VLAN to one of the port , but VLAN interface is still showing…
Junaid
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6
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8 answers

What do the positive and negative (+/-) transmit and receive pins mean on Ethernet cables?

So I'm trying to understand the pin layout of an Ethernet port, specifically for 8P8C which to my understanding is the most common. Of the eight pins, only four are apparently used for communication, as depicted below where pin 1 and 2 are TD+ and…
thansen0
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6
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1 answer

Bandwidth limit Cisco 3400 ME problem

I want to limit bandwidth (speed) of interface of Cisco 3400 ME switch. I did these: policy-map parent class class-default shape average 64000 And in gi0/2 interface I apply it: service-policy output parent It gives me this error: QoS:…
it dev
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6
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3 answers

Are network protocols and routing protocols different things?

When reading about network protocols it says they are a set of rules and format for communication between devices over a network, so basically an agreed way of how to communicate over a network. But then I came across routing protocols which are…
The_Bear
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6
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3 answers

Can I announce prefix 161.117.25.0/24 even though I don't have all of /24 IPs?

I'm managing one BGP router, under the router I'm trying to announce the following IP prefix:161.117.25.0/24. But the problem is that some of the IP addresses were borrowed by other AS(Autonomous System), for example the IP address 161.117.25.100…
Jack
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6
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2 answers

How to display entire MAC address table on HP switches

I want to display the whole MAC address table without needing to press 'space' for the next page, so that if there are 50 entries in the table I'd be able to view them with a single command. I'm working on an HP switch.
user19215
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6
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1 answer

Network not participating in OSPF. Does not appear in the routing table

I am running OSPF on 2 router in GNS simulation for practice. Adjacencies are ok. Router R2 has in the routing table all networks of R3 . But R3 fails to add R2 network in its routing table . The network that is not participating in ospf is the…
blended
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6
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2 answers

What does no shutdown command do? Cisco

Newbie here. I'm studying networking and struggling to understand the no shutdown command. I don't understand what no shutdown command actually does. I've read that it enables the interface but I don't even understand what that means. What does…
The_Bear
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6
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2 answers

How does a TCP segment fit into a smaller IP packet?

The IP protocol can handle fragmentation and it includes the fragmentation offset and identifier. I know this comes into play when your IP packet is too big for some specific network or link where the MTU is lower then the previous one. For example,…
Lucas
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6
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2 answers

Cisco show log number of messages

When I run the "show log" command, it displays the latest 360 messages. Why 360? Can this value by changed? If yes, what is the command for that? Thanks.
Léa Massiot
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