Cabletron Systems SSIM-R8-02 Specifikace stáhnout pdf (Strana 193)

Enterasys Xpedition User Reference Manual 173

BGP Configuration Examples

Using the local-pref Option

For router XP12’s CLI configuration file, local-pref is set to 194:

For router XP13, local-pref is set to 204.

Using the set-pref Option

The formula used to compute the local preference is as follows:

Local_Pref = 254 – (global protocol preference for this route) + set-pref metric

Note: A value greater than 254 will be reset to 254. GateD will only send Local_Pref

values between 0 and 254.

In a mixed GateD and non-GateD network, the non-GateD IBGP implementation may

send Local_Pref values that are greater than 254. When operating a mixed network of this

type, you should make sure that all routers are restricted to sending Local_Pref values in

the range metric to 254.

In router XP12’s CLI configuration file, the import preference is set to 160:

Using the formula for local preference [Local_Pref = 254 - (global protocol preference for

this route) + metric], the Local_Pref value put out by router XP12 is 254 - 160+100 = 194.

For router XP13, the import preference is set to 150. The Local_Pref value put out by router

XP13 is 254 - 150+100 = 204.

Note the following when using the set-pref option:

• All routers in the same network that are running GateD and participating in IBGP

should use the set-pref option, and the set-pref metric should be set to the same value.

/jointfilesconvert/276250/bgp set peer-group as901 local-pref 194

/jointfilesconvert/276250/bgp set peer-group as901 local-pref 204

# Set the set-pref metric for the IBGP peer group

/jointfilesconvert/276250/bgp set peer-group as901 set-pref 100

ip-router policy create /jointfilesconvert/276250/bgp-import-source as900 autonomous-system 64900 preference 160

ip-router policy create /jointfilesconvert/276250/bgp-import-source as900 autonomous-system 64900 preference 150

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Cabletron Systems SSIM-R8-02 Specifikace Strana 193