Heartbeat Frame Format; Q Tagged Heartbeat Frame Format - HP Rx2620-2 - Integrity - 0 MB RAM Manual

frame. Therefore, a transmit path validation heartbeat frame may be transmitted once every
6 seconds (if the transmit path validation interval timer is set to the default of 3 seconds) on
a port that has not transmitted anything. If the port does successfully transmit a heartbeat
or any other kind of frame, its internal status is reset to 0. However, if transmission is not
successful, the team will place the port in a state called "Failed (Tx Heartbeat)" and the team
will failover to a functional non-Primary port.
As long as a port remains in the "Failed (Tx Heartbeat) state, it will attempt to transmit a
heartbeat frame at every timer interval.
In summary, when using the default transmit path validation timer of 3 seconds, each port
may transmit heartbeat frames as often as every 6 seconds and the longest it will take to
detect transmit failures will be 9 seconds.
• Receive path validation – At the receive path validation timer interval (default = 3 seconds),
the team checks to determine if each port has successfully received any frame since the last
timer interval. If not, then the port's internal status is degraded by incrementing the port's
internal status by 1 (starting at 0). After a port's internal status has degraded to 2 (2
transitions) without receiving any kind of frame, all other ports in the same team will transmit
a heartbeat frame with the intention that the port attempting to validate receives will receive
at least one of the transmitted heartbeat frames. If the port does receive one of these
heartbeats, its internal status is reset to 0. However, if the port still does not receive a frame,
then the port is placed in a state called "Failed (Rx Heartbeat)" and the team will fail over
to a functional non-Primary port.
• Switch MAC table updates with team MAC address – There is no timer associated with this type
of heartbeat since it only happens during team initialization or team failover.

Heartbeat Frame Format:

Heartbeat frame size is 84 bytes including the FCS. Heartbeat frames are LLC test frames with
63 bytes of data. The destination address of all heartbeat frames is a Layer 2 multicast address
of 03-00-C7-00-00-EE. This is a HP registered multicast address and used only for heartbeat
frames. Below is an example of a heartbeat frame.
Table 4-1 Heartbeat Frame Format
802.2 frame format
Destination MAC address
Source MAC address
Length
DSAP
SSAP
SNAP type
Data
FCS
Heartbeat frames on a tagged VLAN include an extra 4-byte field used for VLAN identification.
The frame size for VLAN tagged heartbeats is 88 bytes. If multiple VLANs are configured for
the team, the SA may choose which VLAN interface to use for receive path validation heartbeats
via the VLAN Configuration tab. Below is an example of what the heartbeat frame with a VLAN
tag would look like.
Table 4-2 802.1Q Tagged Heartbeat Frame Format
802.2 frame format
Destination MAC address
36 The Mechanics of Teaming for the Advanced User
Value
03-00-C7-00-00-EE
"MAC address of Teamed port"
66
0xAA
0xAA
Unnumbered, TEST
"Teaming Proprietary data"
"Varies"
Value
03-00-C7-00-00-EE
84 bytes total
6 bytes
6 bytes
2 bytes
1 byte
1 byte
1 byte
63 bytes
4 bytes
88 bytes total
6 bytes