Allied Telesis AlliedWare OS - Manual (Page 29)

Page 29 | AlliedWare™ OS How To Note: EPSR
Classifiers and Hardware Filters
To see details, use the command:
show epsr=test
The following diagram shows the expected output.
Classifiers and Hardware Filters
On AT-8948, AT-9900, AT-9900s, and x900 series switches, the switching hardware has a limit
of 16 bytes to use for matching on incoming packets.
EPSR creates a hardware filter that uses 2 bytes for VLAN identification (since version
291-04). This means that you have to design your network carefully when using EPSR with
DHCP snooping, QoS, or other hardware filters.
For example:
• DHCP snooping uses 5 bytes to match on the source and destination UDP ports and the
protocol field. With EPSR and DHCP snooping both enabled, 7 out of the 16 bytes are
used.
• IP addresses use 4 bytes. So if you configured EPSR, DHCP snooping, and a QoS policy
that classified on source IP address, then 11 of the 16 bytes would be used.
--- EPSR Domain Information ---------------------------------------------------
EPSR Domain Name...................... test
EPSR Domain Node Type................. Transit
EPSR Domain State..................... LINKS-UP
MAC Address of Master Node............ 00:00:CD:24:02:4F
EPSR Domain Status.................... Enabled
Control Vlan.......................... 1000
Ring Interface # 1.................... 5.0
Physical State of Ring Interface # 1.. UP
Ring Interface # 1 Type............... UPSTREAM
Ring Interface # 1 State.............. FORWARDING
Ring Interface # 2.................... 5.1
Physical State of Ring Interface # 2.. UP
Ring Interface # 2 Type............... DOWNSTREAM
Ring Interface # 2 State.............. FORWARDING
Hello Timer (seconds.................. N/A
Failover Timer (seconds).............. N/A
Ringflap Timer (seconds).............. N/A
Hello Time Remaining (seconds)........ N/A
Failover Time Remaining (seconds)..... N/A
Ringflap Time Remaining (seconds)..... N/A
Hello Sequence........................ N/A
Data Vlans............................ 2
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