Configure a BFD template to define BFD interval values and authentication settings for single-hop or multi-hop sessions. This enables flexible and reusable BFD configurations across interfaces.
The BFD template specifies a set of BFD interval values. BFD interval values as configured in the BFD template are not specific to a single interface. You can also configure authentication for single-hop and multi-hop sessions. Echo mode is disabled by default. You can enable Echo mode on single-hop only.
Before you begin
No prerequisites are required to configure a BFD template.
Follow these steps to configure a BFD template:
Procedure
Step 1 | Choose . |
Step 2 | Click Add BFD Template or Edit.
Note |
If you are editing a template, you CANNOT modify its name and type.
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Step 3 | On the Template tab, configure the following:
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Template Name—The name of this BFD template. You must assign a name in order to configure the rest of the parameters in the template. The template name CANNOT have spaces and CANNOT have only numbers.
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Type—Click the Single-Hop or Multi-Hop radio button.
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Enable Echo—(Optional) Enables Echo for the single-hop template.
If the Echo function is not negotiated, BFD control packets are sent at a high rate to meet the detection time. If the Echo function is negotiated, BFD control packets are sent at a slower, negotiated rate and self-directed echo packets are sent at a high rate. We recommend that you use Echo mode, if possible.
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Step 4 | On the Interval tab, configure the following:
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From the Interval Type drop-down list, select Microseconds or Milliseconds.
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In the Multiplier field, enter the value to be used for computing the hold down time. This value indicates the number of consecutive BFD control packets that must be missed from a BFD peer before BFD declares that the peer is unavailable and the Layer 3 BFD peer is informed of the failure. The range is 3 to 50. The default is 3.
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In the Minimum Transmit field, enter the minimum transmit interval capability. The range is 50 to 999 milliseconds or 50000 to 999000 microseconds.
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In the Minimum Receive field, enter the minimum receive interval capability. The range is 50 to 999 milliseconds or 50000 to 999000 microseconds.
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Step 5 | On the Authentication tab, configure the following:
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Authentication Type—Select NONE, md5, meticulous-sha-1, meticulous-md5, or sha-1 from the drop-down list.
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Encrypted Password—(Optional) Enables encryption of the authentication password.
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Password—The authentication password that must be sent and received in the packets using the routing protocol being authenticated. The valid value is a string containing 1 to 29 uppercase and lowercase alphanumeric characters, except that the first character CANNOT be a digit or a digit followed by a whitespace. For example, '1password' or '0 password' is invalid.
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Key ID—The shared key ID that matches the key value. The range is 0 to 255.
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Step 6 | Click OK. |
Step 7 | Click Apply to save the BFD template configuration. |
The BFD template is configured with the specified interval values, authentication settings, and echo mode options. The template can now be applied to interfaces as needed.