Time - Cisco SPS208G User Manual

Setup

Time

Time
SPS208G/SPS224G4/SPS2024 Service Provider Switches User Guide
The only exception occurs if a DHCP server is on the same VLAN as the ingress
VLAN. In that case, the packet with no Option 82 is broadcast.
Transparent L2 Relay and L2 DHCP Relay Together
Both features work independently and concurrently.
In Transparent L2 Relay, the agent adds Option 82 to DHCP requests passing
through on the client ingress VLAN.
For any ingress VLAN where Full L2 DHCP Relay is enabled, an additional
Transparent L2 Relay packet is relayed to any remote DHCP server configured by
the user.
L2 DHCP Snooping Alone (with no Option 82)
DHCP broadcasts are bridged in the ingress VLAN without using CPU resources.
DHCP Snooping database and related functionality are supported without Option
82 Insertion, but users can control incoming Option 82 per user configuration.
The Time Screen contains fields for defining system time parameters for both the
local hardware clock, and the external SNTP clock. If the system time is kept using
an external SNTP clock, and the external SNTP clock fails, the system time reverts
to the local hardware clock. Daylight Savings Time can be enabled on the device.
The following is a list of Daylight Time start and end times in specific countries:
•
Albania — Last weekend of March until the last weekend of October.
•
Australia — From the end of October until the end of March.
•
Australia - Tasmania — From beginning of October until the end of March.
•
Armenia — Last weekend of March until the last weekend of October.
•
Austria — Last weekend of March until the last weekend of October.
•
Bahamas — From April to October, in conjunction with U.S. summer hours.
•
Belarus — Last weekend of March until the last weekend of October.
•
Belgium — Last weekend of March until the last weekend of October.
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