Setting the next hop of a bgp4 route – Brocade BigIron RX Series Configuration Guide User Manual

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BigIron RX Series Configuration Guide

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The metric-type type-1 | type-2 parameter changes the metric type of a route redistributed into
OSPF.

The metric-type internal parameter sets the route's MED to the same value as the IGP metric of the
BGP4 next-hop route. The parameter does this when advertising a BGP4 route to an EBGP
neighbor.

The next-hop <ip-addr> parameter sets the IP address of the route’s next hop router.

The origin igp | incomplete parameter sets the route’s origin to IGP or INCOMPLETE.

The tag <tag-value> parameter sets the route’s tag. You can specify a tag value from 0 –
4294967295.

NOTE

This parameter applies only to routes redistributed into OSPF.

NOTE

You also can set the tag value using a table map. The table map changes the value only when the
device places the route in the IP route table instead of changing the value in the BGP route table.
Refer to

“Using a table map to set the tag value”

on page 864.

The weight <num> parameter sets the weight for the route. You can specify a weight value from
0 – 4294967295.

Setting a BP4 route’s MED to be equal to the next-hop route IGP metric

To set a route's MED to the same value as the IGP metric of the BGP4 next-hop route, when
advertising the route to a neighbor, enter commands such as the following.

BigIron RX(config)# access-list 1 permit 192.168.9.0 0.0.0.255

BigIron RX(config)# route-map bgp4 permit 1

BigIron RX(config-routemap bgp4)# match ip address 1

BigIron RX(config-routemap bgp4)# set metric-type internal

The first command configures an ACL that matches on routes with destination network
192.168.9.0. The remaining commands configure a route map that matches on the destination
network in ACL 1, then sets the metric type for those routes to the same value as the IGP metric of
the BGP4 next-hop route.

Syntax: set metric-type internal

Setting the next hop of a BGP4 route

To set the next hop address of a BGP4 route to a neighbor address, enter commands such as the
following.

BigIron RX(config)# route-map bgp5 permit 1

BigIron RX(config-routemap bgp5)# match ip address 1

BigIron RX(config-routemap bgp5)# set ip next-hop peer-address

These commands configure a route map that matches on routes whose destination network is
specified in ACL 1, and sets the next hop in the routes to the neighbor address (inbound filtering) or
the local IP address of the BGP4 session (outbound filtering).

Syntax: set ip next-hop peer-address

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