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doc: work around broken makeinfo on centos7

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Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
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Quentin Young 2018-03-22 12:01:13 -04:00
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@ -100,74 +100,59 @@ BGP decision process
The decision process FRR BGP uses to select routes is as follows: The decision process FRR BGP uses to select routes is as follows:
1. Weight check 1. *Weight check*
Prefer higher local weight routes to lower routes. Prefer higher local weight routes to lower routes.
2. Local preference check 2. *Local preference check*
Prefer higher local preference routes to lower. Prefer higher local preference routes to lower.
3. Local route check 3. *Local route check*
Prefer local routes (statics, aggregates, redistributed) to received routes. Prefer local routes (statics, aggregates, redistributed) to received routes.
4. AS path length check 4. *AS path length check*
Prefer shortest hop-count AS_PATHs. Prefer shortest hop-count AS_PATHs.
5. Origin check 5. *Origin check*
Prefer the lowest origin type route. That is, prefer IGP origin routes to Prefer the lowest origin type route. That is, prefer IGP origin routes to
EGP, to Incomplete routes. EGP, to Incomplete routes.
6. MED check 6. *MED check*
Where routes with a MED were received from the same AS, prefer the route Where routes with a MED were received from the same AS, prefer the route
with the lowest MED. :ref:`bgp-med`. with the lowest MED. :ref:`bgp-med`.
7. External check 7. *External check*
Prefer the route received from an external, eBGP peer over routes received Prefer the route received from an external, eBGP peer over routes received
from other types of peers. from other types of peers.
8. IGP cost check 8. *IGP cost check*
Prefer the route with the lower IGP cost. Prefer the route with the lower IGP cost.
9. Multi-path check 9. *Multi-path check*
If multi-pathing is enabled, then check whether the routes not yet If multi-pathing is enabled, then check whether the routes not yet
distinguished in preference may be considered equal. If distinguished in preference may be considered equal. If
:clicmd:`bgp bestpath as-path multipath-relax` is set, all such routes are :clicmd:`bgp bestpath as-path multipath-relax` is set, all such routes are
considered equal, otherwise routes received via iBGP with identical AS_PATHs considered equal, otherwise routes received via iBGP with identical AS_PATHs
or routes received from eBGP neighbours in the same AS are considered equal. or routes received from eBGP neighbours in the same AS are considered equal.
10. Already-selected external check 10. *Already-selected external check*
Where both routes were received from eBGP peers, then prefer the route
which is already selected. Note that this check is not applied if
:clicmd:`bgp bestpath compare-routerid` is configured. This check can
prevent some cases of oscillation.
Where both routes were received from eBGP peers, then prefer the route 11. *Router-ID check*
which is already selected. Note that this check is not applied if Prefer the route with the lowest `router-ID`. If the route has an
:clicmd:`bgp bestpath compare-routerid` is configured. This check can `ORIGINATOR_ID` attribute, through iBGP reflection, then that router ID is
prevent some cases of oscillation. used, otherwise the `router-ID` of the peer the route was received from is
used.
11. Router-ID check 12. *Cluster-List length check*
The route with the shortest cluster-list length is used. The cluster-list
reflects the iBGP reflection path the route has taken.
Prefer the route with the lowest `router-ID`. If the route has an 13. *Peer address*
`ORIGINATOR_ID` attribute, through iBGP reflection, then that router ID is Prefer the route received from the peer with the higher transport layer
used, otherwise the `router-ID` of the peer the route was received from is address, as a last-resort tie-breaker.
used.
12. Cluster-List length check
The route with the shortest cluster-list length is used. The cluster-list
reflects the iBGP reflection path the route has taken.
13. Peer address
Prefer the route received from the peer with the higher transport layer
address, as a last-resort tie-breaker.
.. index:: bgp bestpath as-path confed .. index:: bgp bestpath as-path confed