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1500 questions
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votes
2 answers

Cisco: No autostate on GigabitEthernet interfaces, any alternative? (not working)

I recently tried the command "no autostate" on a GigabitEthernet interface (on a newer router) and this didn't work anymore, does anyone know why this is occuring? This use to work on FastEthernet interfaces. Any alternative suggestions? Working…
Bulki
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6
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1 answer

Wireshark tcp.len and data.len missmatch

What is the difference between tcp.len and data.len filters? I thought that both mean data size traveling in the segment (not including TCP header). I have a problem related to MTU issue and I'm trying to figure if data size from application layer…
MABC
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6
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5 answers

Dividing a network into subnets using a router

I am learning about how L3 and IPv4 addressing works and I need some clarity on certain things. I've encountered the following topology So in this topology, the router stands in the center and divides the network into two separate sub-networks,…
Mitrixsen
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6
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1 answer

Successful Auto/Auto PAgP Port Channel?

Cisco documentation states the following on forming channels: SW1 SW2 ---------------------------------------- On On = Yes Auto/Desirable Desirable = Yes On/auto/desirable Not configured =…
John Doe
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6
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1 answer

Can a pair of matching WDM transceivers be connected directly?

In fiber optic networks, I understand CWDM technology can multiplex multiple optical signals onto a pair of fibers (or a single one). But can a single pair of CWDM transceivers be connected directly using a pair of fibers without the use of a…
Duvrai
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6
votes
1 answer

Cisco 9300 Software upgrade without automatic reload

Is there a way to upgrade a Cisco Catalyst 9300 switch to a new software version without the switch automatically reloading as part of the initial install process? With other switches (eg Cisco Catalyst 3850) I could do the software install and then…
The Footsie
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6
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1 answer

IPv6 prefix interpretation

I have a very basic question about IPv6 prefix. Taking a very simple example about prefix notation: "2001:db8:abcd:0012::0/64" My question is: Do we call the whole thing under quote as prefix or just the value after back slash? In general term, I…
Network_starter
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6
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1 answer

N5K-5672 CoPP issue

I have a N5K-5672UP with enterprise license and I execute these commands to protect my control plane : control-plane service-policy input copp-system-policy-default There is 2 issues: When I execute show run copp it does not show anything and even…
Blackmetal
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6
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1 answer

After a memory upgrade of my Cisco WAAS, why is the connection limit still the same, how can I raise it?

We use Cisco WAAS appliances for WAN optimization. With increasing traffic, we noticed that the connection limit was frequently reached. In case of our WAVE-574-K9 with 3 GB RAM, there was a limit of 750 connections. So we decided to upgrade the…
Stefan
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6
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2 answers

VLAN-Subnets 1:1?

I often hear people saying that each VLAN is a subnet (or is associated with a subnet) but is that really true? Assume I have 10 big offices. I will have a subnet for each office but only 2 VLANs grouping some computers, e.g. finance workers to be…
Pietros
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6
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3 answers

Why can PPPoE connect to a gateway which is not in the same subnet

We know the host needs to be within the same subnet as its gateway for the routing. However in PPPoE, the public IP has a 255.255.255.255 subnet mask, it means that the IP is not in the same subnet as the gateway. I wonder how the host passes the…
Anning Wuwang
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6
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1 answer

Does EIGRP use AS number/process number as it's PORT NUMBER between routers in the same AS/group?

Does EIGRP use AS number/process number as it's PORT NUMBER between routers in the same AS/group? I know that EIGRP does NOT use TCP/UDP; I know that that EIGRP uses RTP as a mechanism to establish a layer-4-like function to keep EIGRP packets…
Mjaryan
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6
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4 answers

What's the advantage of IPSec over TLS/DTLS?

What's the benefit of IPSec over TLS and DTLS ? If someone's goal is to assure authentication, integrity and confidentiality, can't he/she simply encrypt the content with the two last protocols (on top of TCP and UDP, respectively) ? Why do I only…
Alan Evangelista
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6
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1 answer

Configuring ASR9K using xml

I am configuring static routes using xml, and I had a question regarding the structure of the xml. Both of these ways work, and I want to know if there is any differences between them, or do they both do the same thing. Method 1: Using the xml…
Greg Brown
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6
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1 answer

VXLAN: how receiver knows that the received packet is VXLAN-encapsulated?

I'm trying to understand how a receiver knows that the received packet is a VXLAN-encapsulated. Looking at the VXLAN RFC, I can't see anything specific that defines that the packet contains VXLAN header. I see (parsing the packet from the…
kliteyn
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