HP FlexNetwork HSR6600 Configuration Manual page 112

mode and the other in node protection mode. Automatically created bypass tunnels can be
used to protect any type of CT, but they cannot provide bandwidth protection.
A primary tunnel can have both manually configured and automatically created bypass tunnels. The
PLR will select one bypass tunnel to protect the primary CRLSP. The selected bypass tunnel is
bound to the primary CRLSP.
Manually created bypass tunnels take precedence over automatically created bypass tunnels. An
automatically created bypass tunnel in node protection mode takes precedence over an
automatically created bypass tunnel in link protection mode. Among manually created bypass
tunnels, the PLR selects the bypass tunnel for protecting the primary CRLSP by following these
rules:
1. Selects a bypass tunnel according to the principles, as shown in
2. Prefers the bypass tunnel in node protection mode over the one in link protection mode.
3. Prefers the bypass tunnel with a smaller ID over the one with a bigger tunnel ID.
Table 2 FRR protection principles
Primary
Bandwidt
CRLSP
h required
requires
by
bandwidth
primary
protection or
CRLSP
not
Yes
0
No
Bypass tunnel providing
bandwidth protection
The primary CRLSP cannot be
bound to the bypass tunnel.
102
Table 2.
Bypass tunnel providing no
bandwidth protection
The primary CRLSP can be bound
to the bypass tunnel if CT 0 or no
CT is specified for the bypass
tunnel.
After binding, the RRO message
does not carry the bandwidth
protection flag. The bypass tunnel
does not provide bandwidth
protection for the primary CRLSP,
and performs best-effort
forwarding for traffic of the primary
CRLSP.