Disabling Bfd Echo Mode; Configuring Multi-Vrf Ce - Cisco ME 3400 Software Configuration Manual

Chapter 35 Configuring IP Unicast Routing

Disabling BFD Echo Mode

When you configure a BFD session, BFD echo mode is enabled by default on BFD interfaces. You can
disable echo mode on an interface so it sends no echo packets and but only sends back echo packets
received from a neighbor. When echo mode is disabled, control packets are used detect forwarding
failures. You can configure slow timers to reduce the frequency of BFD control packets.
Beginning in privileged EXEC mode, follow these steps to disable echo mode on a BFD device and to
set the slow timer rate:
Command
Step 1 configure terminal
Step 2
interface interface-id
Step 3 no bfd echo
Step 4 exit
Step 5 bfd slow-timer [milliseconds]
Step 6 end
Step 7 show bfd neighbors detail
Step 8
copy running-config startup-config
To disable reenable echo mode on the switch, enter the bfd echo global configuration command.

Configuring Multi-VRF CE

Virtual Private Networks (VPNs) provide a secure way for customers to share bandwidth over an ISP
backbone network. A VPN is a collection of sites sharing a common routing table. A customer site is
connected to the service-provider network by one or more interfaces, and the service provider associates
each interface with a VPN routing table, called a VPN routing/forwarding (VRF) table.
The switch supports multiple VPN routing/forwarding (multi-VRF) instances in customer edge (CE)
devices (multi-VRF CE). With Multi-VRF CE, a service provider can support two or more VPNs with
overlapping IP addresses.
The switch does not use Multiprotocol Label Switching (MPLS) to support VPNs. For information about
Note
MPLS VRF, refer to the Cisco IOS Switching Services Configuration Guide, Release 12.2.
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OL-9639-07
Purpose
Enter global configuration mode.
Enter a BFD interface and enter interface configuration mode.
Disable BFD echo mode on the interface. It is enabled by default, but can
be disabled independently on BFD neighbors.
Return to global configuration mode.
(Optional) Configure a BFD slow-timer value. The range is from 1000 to
30000 milliseconds. The default is 1000 milliseconds.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Understanding Multi-VRF CE, page 35-82
Default Multi-VRF CE Configuration, page 35-84
Multi-VRF CE Configuration Guidelines, page 35-84
Configuring VRFs, page 35-85
Configuring VRF-Aware Services, page 35-86
Configuring a VPN Routing Session, page 35-89
Configuring BGP PE to CE Routing Sessions, page 35-90
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
Configuring Multi-VRF CE
35-81