5
votes
Accepted
How much CPU power does it take to process a packet?
There are no standard numbers for that. It greatly depends on the actions performed and the way the software is written. For functions like NAT it also depends on the size of the session table and the ...
- 6,780
4
votes
Accepted
High CPU utilization on Juniper ACX2100 chassis fpc
The two CPU utilisation figures are for the forwarding plane/line card and the routing engine respectively.
For the control-plane, you can run show system processes extensive to get an idea as to ...
- 9,565
3
votes
Accepted
What's the difference between the Three Families of Fortinet SPUs?
You will find the relevant information on this page from Fortinet:
https://www.fortinet.com/products/fortigate/fortiasic
Each kind of processor optimizes different features, by handling them directly ...
- 19.8k
3
votes
Accepted
What components of a network switch qualify as ASICs?
The purpose of the switching chip is to perform the switching functions of the device. What they specifically do is unique to the chip in question but generally yes, they perform some of the layer 2 ...
- 2,594
2
votes
Nexus 3064 strange CPU utilization
The value being represented by SNMP monitoring is a result of the MIB/OID being used when you are polling the device. A better command to use for correlation would be "show system resources" and look ...
- 636
2
votes
Nexus 3064 strange CPU utilization
If you look at the legend you'll see that the running average is shown at about 20% (the "#" marks) with the asterisks being peak percentages. The CLI graph is really imprecise, but what you're ...
- 6,152
2
votes
Accepted
Does HUB has calculation function?
Repeater hubs don't (didn't) usually have a CPU, although there were a few managed hubs around.
Simple switches don't have a CPU either. All processing is done within an ASIC (or several coupled ...
- 88.1k
2
votes
Why are DNS packets processed by process-switched?
You have NAT and ip virtual-reassembly enabled on the router with what appears to be a 1 gigabit internet service (or at least it is connected on a 1 gigabit port). This can easily overwhelm the ...
- 2,594
2
votes
FPC ACX2100 high CPU (99%)
There are KB about that log.
This may be a harmless log and can resolve by restarting feb.
https://supportportal.juniper.net/s/article/ACX-Different-parity-errors-are-seen-on-ACX-platforms
ACX1k, ...
- 61
1
vote
Accepted
network processors onboard Network Interface Cards
TCP offloading features integrated into the NIC are most often hardwired, but there are "smart" NICs that are programmable, usually via FPGA.
All modern NICs use DMA.
- 88.1k
1
vote
Why are DNS packets processed by process-switched?
The problem was solved by blocking a pool of IP addresses from Brazil;
CPU load dropped from 90% to 30%.
It is not clear why and why they sent a bunch of DNS requests to us. But why exactly these ...
- 29
1
vote
What components of a network switch qualify as ASICs?
what is the purpose of the switching chip?
The switching chip implements the required layer-2 functions and does the actual forwarding between ports. It often has additional function, depending on ...
- 88.1k
1
vote
Accepted
Cisco Nexus 3064PQ CPU spike causing packetloss
Solution
This is most interesting issue of my life so hold your breath...!
Noticed CoPP Drops in glean & arp
# show policy-map interface control-plane
...
...
class-map copp-s-glean (match-...
- 4,389
Only top scored, non community-wiki answers of a minimum length are eligible