Administrator Guide

• AS Numbers larger than 65535 is represented using ASDOT notation as <higher 2 bytes in decimal>.<lower 2 bytes in decimal>. For
example: AS 65546 is represented as 1.10.
ASDOT representation combines the ASPLAIN and ASDOT+ representations. AS numbers less than 65536 appear in integer format
(asplain); AS numbers equal to or greater than 65536 appear in the decimal format (asdot+). For example, the AS number 65526 appears
as 65526 and the AS number 65546 appears as 1.10.
Dynamic AS Number Notation Application
Dell EMC Networking OS applies the ASN notation type change dynamically to the running-config statements.
When you apply or change an notation, the type selected is reflected immediately in the running-configuration and the show commands
(refer to the following two examples).
Example of Dynamic Changes in the Running Configuration When Using the bgp asnotation Command
ASDOT
DellEMC(conf-router_bgp)#bgp asnotation asdot
DellEMC(conf-router_bgp)#show conf
!
router bgp 100
bgp asnotation asdot
bgp four-octet-as-support
neighbor 172.30.1.250
local-as 65057
<output truncated>
DellEMC(conf-router_bgp)#do show ip bgp
BGP table version is 24901,
local router ID is 172.30.1.57
<output truncated>
ASDOT+
DellEMC(conf-router_bgp)#bgp asnotation asdot+
DellEMC(conf-router_bgp)#show conf
!
router bgp 100
bgp asnotation asdot+
bgp four-octet-as-support
neighbor 172.30.1.250 local-as 65057
<output truncated>
DellEMC(conf-router_bgp)#do show ip bgp
BGP table version is 31571, local router ID is 172.30.1.57
<output truncated>
AS-PLAIN
DellEMC(conf-router_bgp)#bgp asnotation asplain
DellEMC(conf-router_bgp)#sho conf
!
router bgp 100
bgp four-octet-as-support
neighbor 172.30.1.250 local-as 65057
<output truncated>
DellEMC(conf-router_bgp)#do sho ip bgp
BGP table version is 34558, local router ID is 172.30.1.57
<output truncated>
Example of the Running Configuration When AS Notation is Disabled
AS NOTATION DISABLED
DellEMC(conf-router_bgp)#
no bgp asnotation
DellEMC(conf-router_bgp)#sho conf
!
router bgp 100
bgp four-octet-as-support
neighbor 172.30.1.250 local-as 65057
<output truncated>
DellEMC(conf-router_bgp)#do sho ip bgp
BGP table version is 28093, local router ID is 172.30.1.57
AS4 SUPPORT DISABLED
156
Border Gateway Protocol (BGP)