Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 179
Configuration Information, BGP Configuration
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• Multiple instances of the same NLRI in the BGP RIB are not supported and are set to zero in the SNMP query response. • The f10BgpM2NlriIndex and f10BgpM2AdjRibsOutIndex fields are not used. • Carrying MPLS labels in BGP is not supported. The f10BgpM2NlriOpaqueType and f10BgpM2NlriOpaquePointer fields are set to zero. • 4-byte ASN is supported. The f10BgpM2AsPath4byteEntry table contains 4-byte ASN-related parameters based on the configuration. Traps (notifications) specified in the BGP4 MIB draft are not supported. Such traps (bgpM2Established and bgpM2BackwardTransition) are supported as part of RFC 1657. Configuration Information The software supports BGPv4 as well as the following: • deterministic multi-exit discriminator (MED) (default) • a path with a missing MED is treated as worst path and assigned an MED value of (0xffffffff) • the community format follows RFC 1998 • delayed configuration (the software at system boot reads the entire configuration file prior to sending messages to start BGP peer sessions) The following are not yet supported: • auto-summarization (the default is no auto-summary) • synchronization (the default is no synchronization) BGP Configuration To enable the BGP process and begin exchanging information, assign an AS number and use commands in ROUTER BGP mode to configure a BGP neighbor. By default, BGP is disabled. By default, the system compares the MED attribute on different paths from within the same AS (the bgp always-comparemed command is not enabled). NOTE: All newly configured neighbors and peer groups are disabled. To enable a neighbor or peer group, enter the neighbor {ip-address | peer-group-name} no shutdown command. The following table displays the default values for BGP in the Dell Networking OS. Table 9. BGP Default Values Item BGP Neighbor Adjacency changes Fast External Fallover feature Graceful Restart feature Local preference MED Route Flap Damping Parameters Default All BGP neighbor changes are logged. Disabled Disabled 100 0 half-life = 15 minutes reuse = 750 suppress = 2000 max-suppress-time = 60 minutes Border Gateway Protocol IPv4 (BGPv4) 179
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