![background image](http://html1.mh-extra.com/html/foundry-networks/fastiron-edge-switch-x424/fastiron-edge-switch-x424_manual_2324269608.webp)
Foundry Configuration Guide for the FESX, FSX, and FWSX
21 - 36
© Foundry Networks, Inc.
December 2005
•
Configure the local AS number. The local AS number indicates membership in a sub-AS. All BGP routers
with the same local AS number are members of the same sub-AS. BGP routers use the local AS number
when communicating with other BGP routers within the confederation.
•
Configure the confederation ID. The confederation ID is the AS number by which BGP routers outside the
confederation know the confederation. Thus, a BGP router outside the confederation is not aware and does
not care that your BGP routers are in multiple sub-ASs. BGP routers use the confederation ID when
communicating with routers outside the confederation. The confederation ID must be different from the sub-
AS numbers.
•
Configure the list of the sub-AS numbers that are members of the confederation. All the routers within the
same sub-AS use IBGP to exchange router information. Routers in different sub-ASs within the confederation
use EBGP to exchange router information.
To configure four Layer 3 Switches to be a member of confederation 10 (as shown in Figure 21.3), consisting of
two sub-ASs (64512 and 64513), enter commands such as the following.
Commands for Router A
FESX424 RouterA(config)# router bgp
FESX424 RouterA(config-bgp-router)# local-as 64512
FESX424 RouterA(config-bgp-router)# confederation identifier 10
FESX424 RouterA(config-bgp-router)# confederation peers 64512 64513
FESX424 RouterA(config-bgp-router)# write memory
Syntax:
local-as <num>
The <num> parameter with the
local-as
command indicates the AS number for the BGP routers within the sub-
AS. You can specify a number from 1 – 65535. Foundry recommends that you use a number within the range of
well-known private ASs, 64512 – 65535.
Syntax:
confederation identifier <num>
The <num> parameter with the
confederation identifier
command indicates the confederation number. The
confederation ID is the AS number by which BGP routers outside the confederation know the confederation. Thus,
a BGP router outside the confederation is not aware and does not care that your BGP routers are in multiple sub-
ASs. BGP routers use the confederation ID when communicating with routers outside the confederation. The
confederation ID must be different from the sub-AS numbers. You can specify a number from 1 – 65535.
Syntax:
confederation peers <num> [<num> …]
The <num> parameter with the
confederation peers
command indicates the sub-AS numbers for the sub-ASs in
the confederation. You must specify all the sub-ASs contained in the confederation. All the routers within the
same sub-AS use IBGP to exchange router information. Routers in different sub-ASs within the confederation use
EBGP to exchange router information. You can specify a number from 1 – 65535.
Commands for Router B
FESX424 RouterB(config)# router bgp
FESX424 RouterB(config-bgp-router)# local-as 64512
FESX424 RouterB(config-bgp-router)# confederation identifier 10
FESX424 RouterB(config-bgp-router)# confederation peers 64512 64513
FESX424 RouterB(config-bgp-router)# write memory
Commands for Router C
FESX424 RouterC(config)# router bgp
FESX424 RouterC(config-bgp-router)# local-as 64513
FESX424 RouterC(config-bgp-router)# confederation identifier 10
FESX424 RouterC(config-bgp-router)# confederation peers 64512 64513
FESX424 RouterC(config-bgp-router)# write memory
Commands for Router D
FESX424 RouterD(config)# router bgp
FESX424 RouterD(config-bgp-router)# local-as 64513
FESX424 RouterD(config-bgp-router)# confederation identifier 10
FESX424 RouterD(config-bgp-router)# confederation peers 64512 64513
Summary of Contents for FastIron Edge Switch X424
Page 36: ...Foundry Configuration Guide for the FESX FSX and FWSX 2 12 Foundry Networks Inc December 2005...
Page 56: ...Foundry Configuration Guide for the FESX FSX and FWSX 3 20 Foundry Networks Inc December 2005...
Page 70: ...Foundry Configuration Guide for the FESX FSX and FWSX 4 14 Foundry Networks Inc December 2005...
Page 198: ...Foundry Configuration Guide for the FESX FSX and FWSX 8 38 Foundry Networks Inc December 2005...
Page 316: ...Foundry Configuration Guide for the FESX FSX and FWSX 12 26 Foundry Networks Inc December 2005...
Page 350: ...Foundry Configuration Guide for the FESX FSX and FWSX 15 12 Foundry Networks Inc December 2005...
Page 458: ...Foundry Configuration Guide for the FESX FSX and FWSX 18 18 Foundry Networks Inc December 2005...
Page 712: ...Foundry Configuration Guide for the FESX FSX and FWSX 22 32 Foundry Networks Inc December 2005...
Page 760: ...Foundry Configuration Guide for the FESX FSX and FWSX A 34 Foundry Networks Inc December 2005...
Page 796: ...Foundry Configuration Guide for the FESX FSX and FWSX C 18 Foundry Networks Inc December 2005...
Page 820: ...Foundry Configuration Guide for the FESX FSX and FWSX E 10 Foundry Networks Inc December 2005...