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Configuring IP Router Parameters
BFD for RSVP-TE
BFD will notify RSVP-TE if the BFD session goes down, in addition to notifying other configured
BFD enabled protocols (for example, OSPF, IS-IS and PIM). This notification will then be used by
RSVP-TE to begin the reconvergence process. This greatly accelerates the overall RSVP-TE
response to network failures.
All encapsulation types supporting IPv4 is supported as all BFD packets are carried in IPv4
packets; this includes Frame Relay .
BFD is supported on the following interfaces:
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•
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Echo Support
Echo support for BFD calls for the support of the echo function within BFD. By supporting BFD
echo, the 7450 ESS loops back received BFD echo messages to the original sender based on the
destination IP address in the packet.
The echo function is useful when the local router does not have sufficient CPU power to handle a
periodic polling rate at a high frequency. As a result, it relies on the echo sender to send a high rate
of BFD echo messages through the receiver node, which is only processed by the receiver's
forwarding path. This allows the echo sender to send BFD echo packets at any rate.
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Ethernet (Null, Dot1Q & QinQ)
POS interfaces (including APS)
Channelized interfaces (PPP, HDLC, FR & ATM) on ASAP (priority 1) and channelized
MDAs (Priority 2) including link bundles and IMA
Spoke SDPs
LAG interfaces
VSM interfaces
7450 ESS OS Router Configuration Guide
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