How many vCPUs and how much memory do the different NetWall Virtual Appliances support?

Last modified on 20 Mar, 2024. Revision 8


How many vCPUs and how much memory do the different Virtual Appliances support?



32-bit Image (x86)64-bit Image (x86_64)64-bit Image (ARMv8)Comment
Number of vCPU Supported
1 vCPU
32-bit image: The image will run in interrupt mode. 64-bit image: The image can run in either interrupt mode or polling mode (See below for details)
2 vCPU
The image will run in polling mode.
3 vCPU

The image will run in polling mode and use one vCPU for interface offloading.
Recommended Memory
Min512 MB1 GB1 GBcOS Core can run with less memory if needed, but this is the recommended minimum for normal operation.
Max4 GB16 GB16 GB


FAQ

What is the difference between interrupt and polling mode in Virtual Appliances?

The main difference between interrupt and polling is that in interrupt, the device notifies the CPU that it requires attention while, in polling, the CPU continuously checks the status of the devices to find whether they require attention. In brief, an interrupt is asynchronous whereas polling is synchronous. This means that when running polling mode the CPU load on the VM will always be 100%.

While it is possible to run using only 1 vCPU it is recommended to use at least two as one vCPU will then be used by the Linux base system which is used for memory management, disk access and more. Using only 1 vCPU may result in packet latency as both cOS Core and the Linux base will share the same CPU.

Why does the 64-bit version require 3 vCPUs to enable poll-offloading?

See previous answer, since Poll-offloading requires a dedicated vCPU it would not be enough to allocate only two vCPUs in order to enable this feature.

What are the criterias to run interrupt mode using 1 CPU Core on a 64 bit image?

Below is a small list of the requirements in order to run interrupt mode on 64 bit.

  • A Virtual system.
  • Only 1 CPU core allocated (so no poll-cores enabled).
  • Advanced setting->Misc->"Interface Interrupt mode" must be set to Auto (default).
  • The VIRT-IO interface driver is NOT used.
    • Note: Interrupt mode is currently verified to work with the E1000E driver for VMware. Mixing e.g. VIRT-IO and E1000E will cause it to fall back to polling mode.

Which Virtual Appliance Image should I choose, 32-bit or 64-bit Virtual Appliance?

This depends on your need, if you need many small firewalls, using as little resources as possible you should select the 32-bit image, if you need high performance the 64-bit image with multiple vCPUs are a better choice.

Related articles

Configuring L2TP/IPsec Server using PSK
11 Jan, 2023 ipsec core vpn
Brian Smart Search (Beta)
15 Jan, 2024 dictionary troubleshoot core stream incontrol incenter oneconnect cloudservice
Roaming IKEv2 tunnel setup in cOS Core with XCA CA and FreeRADIUS
10 Mar, 2023 core vpn ikev2 windows radius certificate
cOS Core TLS ALG setup using IP Policies
4 Apr, 2023 core tls alg https
Setup of a Layer-3 bridge over IPsec in cOS Core
12 Apr, 2023 core proxyarp arp ipsec routing
Moving configurations between dissimilar NetWall hardware
1 Feb, 2023 core wizard hardware migration netwall
How to disable IP Reputation in cOS Core
21 Mar, 2023 core ipreputation log
cOS Core 14.00 FAQ
18 Jan, 2024 arm x86 core
Configuring public certificates in NetWall firewalls
18 Mar, 2024 core certificate oneconnect ipsec vpn
cOS Core HA clusters in VMware with Promiscuous Mode
4 Apr, 2023 core vmware highavailability ha promiscuous
User Auth with Active Directory using cOS Core RADIUS/LDAP
24 Apr, 2023 core legacy activedirectory radius userauth
Configure the Android OpenConnect client towards Clavister NetWall
23 Aug, 2022 sslvpn openconnect oneconnect android core
CSPN (Clavister Service Provisioning Network) details for license & database updates
17 Nov, 2022 core license updates idp antivirus wcf ipreputation applicationcontrol
Getting totals for triggering cOS Core IP rule set entries
16 Mar, 2023 core incontrol statistics rules
Closing existing sessions when cOS Core schedules trigger
2 May, 2023 core rules schedule applicationcontrol
Using Stateless IP Policies in cOS Core
4 Apr, 2023 core stateless connections
cOS Core LDAP auth issues with Microsoft AD servers
11 Apr, 2023 ldap core authentication radius
Using PCAP packet capture in cOS Core
7 Sep, 2022 core cli pcap netwall pcapdump
cOS Core L2TP server setup with Windows Server CA certificates
21 Feb, 2023 ipsec certificate windows ca core
Problem with auto-created Core routes
22 Mar, 2021 core ipsec routing
Certificate update in InControl global domain on certificate that is used on firewall(s)
18 Mar, 2024 core incontrol certificate oneconnect ipsec vpn
Setting up OSPF with IPsec in cOS Core
16 Apr, 2024 core routing ospf ipsec
A trusted webpage blocked by IP reputation
7 Sep, 2023 core ipreputation
Could not open outbound connection?
9 Mar, 2021 core ping connections
Configure Linux OpenConnect towards Clavister NetWall
5 Mar, 2021 sslvpn openconnect oneconnect linux core
Troubleshoot firewall MTU issues using Wireshark
4 Apr, 2023 core pcap pcapdump wireshark
Configuring SSL-VPN / OneConnect server on secondary Firewall IP address
8 Apr, 2021 core sslvpn oneconnect interfaces arp
Using /31 network masks in cOS Core (RFC-3021)
1 Jun, 2022 core routing management
Device initiated InControl management of NetWall HA clusters with a single public IP
31 Mar, 2022 incontrol core netcon netwall ha cluster coscore
Configuring a Captive Portal in cOS Core
12 Apr, 2023 howto core authenticator authentication webauth captive
Using Multicast DNS with cOS Core
24 May, 2021 core howto mdns multicast transparentmode airprint igmp dns
cOS Core IPsec IKEv1 "No_Proposal_Chosen" error in 14.00.10
4 Aug, 2023 core ipsec troubleshoot ike
IPsec license usage calculation
14 Apr, 2021 core license ipsec
Does IPsecBeforeRules trigger before Access rules?
8 Sep, 2020 core ipsec rules access
Automation of Lets Encrypt certificate updates
23 Jan, 2024 core howto certificate management letsencrypt
Split tunneling in cOS Core with Windows L2TP/IPsec clients
29 Mar, 2023 ipsec core windows vpn l2tp
The TCP Window Scale Log Event
15 Nov, 2022 tcp log core
Clavister Advisories (IDP/AV/CVE/WCF)
22 Apr, 2024 core idp security antivirus wcf
Howto - Userbased rules
27 Feb, 2024 oneconnect userbased core
Clavister SFP/SFP+ module compatibility
7 Feb, 2024 core sfp gbic hardware
Changing the certificate used by the OneConnect client/server
28 Nov, 2022 core configuration oneconnect
Avoiding cOS Core HA interruptions during configuration deployment
20 Feb, 2023 ha core idp cli cluster antivirus configuration
Changing the certificate used by cOS Core's SSL VPN client/server
25 Nov, 2022 core configuration sslvpn management
Automatically stop active PCAPdump or Logsnoop in the CLI
7 Dec, 2022 pcapdump log cli core logsnoop
Troubleshooting IPsec tunnels (IKEv1)
7 Dec, 2022 ipsec ike troubleshoot core
Why some log category ID's are missing
23 May, 2022 core log logreceiver
Group membership in FreeRADIUS with cOS Core
6 Apr, 2023 core radius authentication
NetWall virtual firewall creation under KVM on ARM
20 May, 2021 kvm core arm coscore netwall
Allowing Traceroute to and through cOS Core
23 Aug, 2022 core behaviour icmp ping traceroute
cOS Core IKEv2 tunnel setup with certificates for iOS clients
5 Apr, 2023 core nps ipsec radius legacy
QoS / Traffic Shaping: Will cOS Core alter DiffServ tagging?
6 Feb, 2023 core trafficshaping pipes tcp
The meaning of the Default_Access_Rule log entry
7 Nov, 2022 core arp log routing
Transparent mode & L2TPv3 unavailable in cOS Core HA clusters
17 Feb, 2023 core ha cluster transparentmode l2tpv3
How to setup a simple cloud-init environment for testing
30 Nov, 2020 howto core cloud-init dhcp
Protecting against the Apache Log4j exploit
15 Dec, 2021 core idp ipreputation log4j
What is a "zombie" connection?
24 Mar, 2021 core connections
Managing NetWall HA clusters over the Internet using one public IP
21 Jun, 2022 core ha hacluster netwall coscore slb
Assigning additional IPs to cOS Core Ethernet interfaces
7 May, 2021 core ethernet vlan arp garp
Roaming Windows IKEv2 setup with NetWall as CA server
22 May, 2024 netwall ikev2 windows certificate vpn core
Troubleshooting cOS Core rules/routes with ping simulation
17 Mar, 2023 core routing rules ping icmp cli
Allowing Path MTU discovery in cOS Core
10 Oct, 2022 core mtu netwall mtudiscovery
Freeing up more memory in the Firewall
23 Aug, 2022 core connections ipsec memory
Is Statless (FwdFast) faster than a normal IP policy?
27 Jan, 2021 core stateless routing brokenlink
cOS Core High Availability Cluster troubleshooting
23 Feb, 2023 core troubleshoot cluster ha
Route failover with IPsec tunnels in cOS Core
13 Feb, 2023 ipsec core routing failover
Public network transparency using cOS Core Proxy ARP instead of subnetting
18 Apr, 2023 core routing transparentmode proxyarp
Configure the OpenConnect-GUI client towards Clavister NetWall
23 Aug, 2022 sslvpn openconnect oneconnect macos windows linux core
Radius vs LDAP for authentication
21 Nov, 2022 radius ldap authentication core