Cisco Catalyst 9500

DNS Customization
Custom application called MYDNS using the DNS domain name “mydomain.com” with selector
ID 12.
Device# configure terminal
Device(config)# ip nbar custom MYDNS dns domain-name *mydomain.com id 12
Composite Customization
NBAR2 provides a way to customize applications based on domain names appearing in HTTP, SSL or DNS.
Composite Customization
Custom application called MYDOMAIN using HTTP, SSL or DNS domain name “mydomain.com”
with selector ID 13.
Device# configure terminal
Device(config)# ip nbar custom MYDOMAIN composite server-name *mydomain.com id 13
L3/L4 Customization
Layer3/Layer4 customization is based on the packet tuple and is always matched on the first packet of a flow.
L3/L4 Customization
Custom application called LAYER4CUSTOM matching IP addresses 10.56.1.10 and 10.56.1.11,
TCP and DSCP ef with selector ID 14.
Device# configure terminal
Device(config)# ip nbar custom LAYER4CUSTOM transport tcp id 14
Device(config-custom)# ip address 10.56.1.10 10.56.1.11
Device(config-custom)# dscp ef
Examples: Monitoring Custom Applications
Show Commands for Monitoring Custom Applications
show ip nbar protocol-id | inc Custom
Device# show ip nbar protocol-id | inc Custom
LAYER4CUSTOM 14 Custom
MYDNS 12 Custom
MYDOMAIN 13 Custom
MYHTTP 10 Custom
MYSSL 11 Custom
show ip nbar protocol-discovery protocol CUSTOM_APP
Device# show ip nbar protocol-id MYSSL
Protocol Name id type
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MYSSL 11 Custom
System Management Configuration Guide, Cisco IOS XE Amsterdam 17.2.x (Catalyst 9500 Switches)
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Configuring Application Visibility and Control in a Wired Network
Composite Customization