Specifications

222 Implementing IBM System Networking 10Gb Ethernet Switches
– Redistribute: Default routes are either configured through default gateway or learned
through other protocols and redistributed to peers. If the routes are learned from
default gateway configuration, you must enable static routes, because the routes from
default gateway are static routes. Similarly, if the routes are learned from a certain
routing protocol, you must enable that protocol.
򐂰 Run [no] neighbor <peer number> redistribute rip at the BGP level to enable or
disable advertising RIP routes.
򐂰 Run [no] neighbor <peer number> redistribute ospf at the BGP level to enable or
disable advertising OSPF routes.
򐂰 Run [no] neighbor <peer number> redistribute fixed at the BGP level to enable or
disable advertising fixed routes.
򐂰 Run [no] neighbor <peer number> redistribute static at the BGP level to enable or
disable advertising static routes.
򐂰 Run show ip bgp neighbor <peer number> redistribute to show the current
redistribution configuration.
BGP aggregation configuration
You can use the following commands to configure BGP aggregation to specify the
routes/range of IP destinations a peer router accepts from other peers. All matched routes
are aggregated to one route, to reduce the size of the routing table. By default, the first
aggregation number is enabled and the rest are disabled.
򐂰 Run aggregate-address <1-16> <IP address> <IP netmask> at the BGP level to define
the starting subnet IP address for this aggregation, using dotted decimal notation. The
default address is 0.0.0.0.
򐂰 Run [no]aggregate-address <1-16> enable at the BGP level to enable or disable this
BGP aggregation.
򐂰 Run no aggregate-address <1-16> at the BGP level to delete this BGP aggregation.
򐂰 Run show ip bgp aggregate-address [<1-16>] to show the current BGP
aggregation configuration.
5.4 High availability
This section describes high availability mechanisms in switches running IBM Networking OS.
All the features, except Hot Links, were used in the reference architecture, and the
implementation steps, along with the commands and their output, are shown in this section.
The topics described in this section are:
򐂰 Virtual Router Redundancy Protocol (VRRP)
򐂰 Layer 2 Failover
򐂰 Trunking
򐂰 Hot Links
Note: No routes are configured in our configuration.