Table 11. Redistributed Route Rules
Command Settings
BGP Local Routing
Information Base
MED Advertised to Peer
WITH route-map metric-
type internal
MED Advertised to Peer
WITHOUT route-map
metric-type internal
redistribute isis (IGP cost
= 20)
MED: IGP cost 20
MED = 20
MED = 0
redistribute isis route-
map set metric 50
MED: IGP cost 50
MED: 50 MED: 50
MED: 50 MED: 50
redistribute isis metric
100
MED: IGP cost 100
MED: 100
MED: 100
Ignore Router-ID in Best-Path Calculation
You can avoid unnecessary BGP best-path transitions between external paths under certain conditions. The
bgp bestpath router-id ignore
command reduces network disruption caused by routing and
forwarding plane changes and allows for faster convergence.
Four-Byte AS Numbers
You can use the 4-Byte (32-bit) format when configuring autonomous system numbers (ASNs).
The 4-Byte support is advertised as a new BGP capability (4-BYTE-AS) in the OPEN message. If a 4-Byte BGP
speaker has sent and received this capability from another speaker, all the messages will be 4-octet. The
behavior of a 4-Byte BGP speaker is different with the peer depending on whether the peer is a 4-Byte or 2-
Byte BGP speaker.
Where the 2-Byte format is 1-65535, the 4-Byte format is 1-4294967295. Enter AS numbers using the
traditional format. If the ASN is greater than 65535, the dot format is shown when using the
show ip bgp
commands. For example, an ASN entered as 3183856184 appears in the
show
commands as 48581.51768; an
ASN of 65123 is shown as 65123. To calculate the comparable dot format for an ASN from a traditional
format, use ASN/65536. ASN%65536.
Traditional
Format
DOT Format
65001
0.65501
65536
1.0
100000
1.34464
4294967295
65535.65535
When creating Confederations, all the routers in a Confederation must be either 4-Byte or 2-Byte identified
routers. You cannot mix them.
Configure 4-byte AS numbers with the
four-octet-support
command.
Border Gateway Protocol IPv4 (BGPv4)
220
Summary of Contents for S4048T
Page 1: ...Dell Configuration Guide for the S4048T ON System 9 10 0 1 ...
Page 98: ... saveenv 7 Reload the system uBoot mode reset Management 98 ...
Page 113: ...Total CFM Pkts 10303 CCM Pkts 0 LBM Pkts 0 LTM Pkts 3 LBR Pkts 0 LTR Pkts 0 802 1ag 113 ...
Page 411: ...mode transit no disable Force10 Resilient Ring Protocol FRRP 411 ...
Page 590: ...Figure 67 Inspecting the LAG Configuration Link Aggregation Control Protocol LACP 590 ...
Page 646: ...Figure 87 Configuring Interfaces for MSDP Multicast Source Discovery Protocol MSDP 646 ...
Page 647: ...Figure 88 Configuring OSPF and BGP for MSDP Multicast Source Discovery Protocol MSDP 647 ...
Page 653: ...Figure 91 MSDP Default Peer Scenario 2 Multicast Source Discovery Protocol MSDP 653 ...
Page 654: ...Figure 92 MSDP Default Peer Scenario 3 Multicast Source Discovery Protocol MSDP 654 ...
Page 955: ...Figure 119 Single and Double Tag First byte TPID Match Service Provider Bridging 955 ...