Connectivity Guide

3 Enter Address Family mode in ROUTER-NEIGHBOR mode.
address-family {[ipv4 | ipv6] [unicast])
4 Allow the specied neighbor to send or receive multiple path advertisements in ROUTER-BGP mode. The count parameter controls
the number of paths that are advertised — not the number of paths received.
add-path [both | received | send] count
Enable additional paths
OS10(config)# router bgp 102
OS10(conf-router-bgp-102)# neighbor 32.1.1.2
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-bgp-neighbor-af)# add-path both 3
MED attributes
OS10 uses the MULTI_EXIT_DISC or MED attribute when comparing EBGP paths from the same AS. MED comparison is not performed in
paths from neighbors with dierent AS numbers.
1 Enable MED comparison in the paths from neighbors with dierent AS in ROUTER-BGP mode.
always-compare-med
2 Change the best path MED selection in ROUTER-BGP mode.
bestpath med {confed | missing-as-best}
• confed—Selects the best path MED comparison of paths learned from BGP confederations.
• missing-as-best—Treats a path missing an MED as the most preferred one.
• missing-as-worst—Treats a path missing an MED as the least preferred one.
Modify MED attributes
OS10(config)# router bgp 100
OS10(conf-router-bgp-100)# always-compare-med
OS10(conf-router-bgp-100)# bestpath med confed
Local preference attribute
You can change the value of the LOCAL_PREFERENCE attributes for all routes the router receives. To change the LOCAL_PREF value in
ROUTER-BGP mode from 0 to 4294967295 with default 100, use the default local preference value command.
To view the BGP conguration, use the show running-configuration command. A more exible method for manipulating the
LOCAL_PREF attribute value is to use a route-map.
1 Assign a name to a route map in CONFIGURATION mode.
route-map map-name {permit | deny | sequence-number}
2 Change the LOCAL_PREF value for routes meeting the criteria of this route map in ROUTE-MAP mode, then return to
CONFIGURATION mode.
set local-preference value
exit
3 Enter ROUTER-BGP mode.
router bgp as-number
4 Enter the neighbor to apply the route map conguration in ROUTER-BGP mode.
neighbor {ip-address}
5 Apply the route map to the neighbor’s incoming or outgoing routes in ROUTER-BGP-NEIGHBOR-AF mode.
route-map map-name {in | out)
Layer 3
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