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Establish BGP Peer Use 4-byte-AS-Number
Establish BGP Peer Use 4-byte-AS-Number
- Tracy Yang (Unlicensed)
Owned by Tracy Yang (Unlicensed)
Mar 16, 2021
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Case 1
One Peer Enable 4-byte-as-number. Another Peer Didn’t Enable 4-byte-as-number.
Figure 1-7
Step 1: Enable 4-Byte-AS-Number on Switch B
Switch B:
admin@XorPlus# set protocols bgp enable-4byte-as-numbers true
Step 2: Configure BGP-ID and Local-AS
Switch A:
admin@XorPlus# set protocols bgp bgp-id 9.9.9.9 admin@XorPlus# set protocols bgp local-as "9"
Switch B:
admin@XorPlus# set protocols bgp bgp-id 6.6.6.6 admin@XorPlus# set protocols bgp local-as "6.0"
Step 3: Configure BGP Peer
Note: User must use a special as number 23456 if local didn’t enable 4-Byte-AS-Number but its peer already enabled 4-Byte-AS-Number.
Switch A:
admin@XorPlus# set protocols bgp peer 3003::1 local-ip "3003::2" admin@XorPlus# set protocols bgp peer 3003::1 as "23456" admin@XorPlus# set protocols bgp peer 3003::1 ipv6-unicast true
Switch B:
admin@XorPlus# set protocols bgp peer 3003::2 local-ip "3003::1" admin@XorPlus# set protocols bgp peer 3003::2 as "9" admin@XorPlus# set protocols bgp peer 3003::2 ipv6-unicast true
Step 4: Check BFP Peer Status
Switch A:
admin@XorPlus# run show bgp peers detail 3003::1 Peer 1: local 3003::2/56968 remote 3003::1/179 Peer ID: 6.6.6.6 Peer State: ESTABLISHED Admin State: START Negotiated BGP Version: 4 Peer AS Number: 23456 Updates Received: 0, Updates Sent: 0 Messages Received: 5, Messages Sent: 5 Time since last received update: n/a Number of transitions to ESTABLISHED: 5 Time since last entering ESTABLISHED state: 87 seconds Retry Interval: 120 seconds Hold Time: 90 seconds, Keep Alive Time: 30 seconds Configured Hold Time: 90 seconds, Configured Keep Alive Time: 30 seconds Minimum AS Origination Interval: 0 seconds Minimum Route Advertisement Interval: 0 seconds
Switch B:
admin@XorPlus# run show bgp peers detail 3003::2 Peer 1: local 3003::1/179 remote 3003::2/56968 Peer ID: 9.9.9.9 Peer State: ESTABLISHED Admin State: START Negotiated BGP Version: 4 Peer AS Number: 9 Updates Received: 0, Updates Sent: 0 Messages Received: 5, Messages Sent: 6 Time since last received update: n/a Number of transitions to ESTABLISHED: 5 Time since last entering ESTABLISHED state: 100 seconds Retry Interval: 120 seconds Hold Time: 90 seconds, Keep Alive Time: 30 seconds Configured Hold Time: 90 seconds, Configured Keep Alive Time: 30 seconds Minimum AS Origination Interval: 0 seconds Minimum Route Advertisement Interval: 0 seconds
Step 5: Switch B Distribute a BGP route entry, then check the BGP route table on Switch A
Switch B BGP route table:
admin@XorPlus# run show bgp routes ipv6 Status Codes: * valid route, > best route Origin Codes: i IGP, e EGP, ? incomplete Prefix Nexthop Peer AS Path ---------------------------- ------------------------ --------------- ------------ *> 9999::9/128 3003::2 0.0.0.0 ? admin@XorPlus# run show bgp routes ipv6 detail 9999::9/128 From peer: 0.0.0.0 Route: Winner Origin: INCOMPLETE AS Path: Nexthop: 3003::2 Local Preference: 100 admin@XorPlus#
Switch A BGP route table:
admin@XorPlus# run show bgp routes ipv6 Status Codes: * valid route, > best route Origin Codes: i IGP, e EGP, ? incomplete Prefix Nexthop Peer AS Path ---------------------------- ------------------------ --------------- ------------ *> 9999::9/128 3003::1 6.6.6.6 23456 ? admin@XorPlus# run show bgp routes ipv6 detail 9999::9/128 From peer: 6.6.6.6 Route: Winner Origin: INCOMPLETE AS Path: 23456 Nexthop: 3003::1 Multiple Exit Discriminator: 0 Local Preference: 100 AS4 Path: 6.0 admin@XorPlus#
Note: User can see that the AS-path is 23456. The BGP route entry came from Switch B, as Switch A didn’t support 4-Byte-AS-Number.
Case 2
Two Peer All Enable 4-byte-as-number
Figure 1-8
Step 1: Enable 4-Byte-AS-Number on Switch A and Switch B
Switch A:
admin@XorPlus# set protocols bgp enable-4byte-as-numbers true
Switch B:
admin@XorPlus# set protocols bgp enable-4byte-as-numbers true
Step 2: Configure BGP-ID and 4-Byte-AS-Number
Switch A:
admin@XorPlus# set protocols bgp bgp-id 9.9.9.9 admin@XorPlus# set protocols bgp local-as "1.0"
Switch B:
admin@XorPlus# set protocols bgp bgp-id 6.6.6.6 admin@XorPlus# set protocols bgp local-as "1.1"
Step 3: Configure BGP Peer
Switch A:
admin@XorPlus# set protocols bgp peer 3003::1 local-ip "3003::2" admin@XorPlus# set protocols bgp peer 3003::1 as "1.1" admin@XorPlus# set protocols bgp peer 3003::1 ipv6-unicast true
Switch B:
admin@XorPlus# set protocols bgp peer 3003::2 local-ip "3003::1" admin@XorPlus# set protocols bgp peer 3003::2 as "1.0" admin@XorPlus# set protocols bgp peer 3003::2 ipv6-unicast true
Step 4: Check BGP Peer Status
Switch A:
admin@XorPlus# run show bgp peers detail 3003::1 Peer 1: local 3003::2/50552 remote 3003::1/179 Peer ID: 6.6.6.6 Peer State: ESTABLISHED Admin State: START Negotiated BGP Version: 4 Peer AS Number: 65537 Updates Received: 0, Updates Sent: 0 Messages Received: 5, Messages Sent: 5 Time since last received update: n/a Number of transitions to ESTABLISHED: 7 Time since last entering ESTABLISHED state: 89 seconds Retry Interval: 120 seconds Hold Time: 90 seconds, Keep Alive Time: 30 seconds Configured Hold Time: 90 seconds, Configured Keep Alive Time: 30 seconds Minimum AS Origination Interval: 0 seconds Minimum Route Advertisement Interval: 0 seconds
Switch B:
admin@XorPlus# run show bgp peers detail 3003::2 Peer 1: local 3003::1/179 remote 3003::2/50552 Peer ID: 9.9.9.9 Peer State: ESTABLISHED Admin State: START Negotiated BGP Version: 4 Peer AS Number: 65536 Updates Received: 0, Updates Sent: 0 Messages Received: 6, Messages Sent: 7 Time since last received update: n/a Number of transitions to ESTABLISHED: 7 Time since last entering ESTABLISHED state: 120 seconds Retry Interval: 120 seconds Hold Time: 90 seconds, Keep Alive Time: 30 seconds Configured Hold Time: 90 seconds, Configured Keep Alive Time: 30 seconds Minimum AS Origination Interval: 0 seconds Minimum Route Advertisement Interval: 0 seconds
Step 5: Switch B distribute one BGP route entry to Switch B, then check the BGP route table:
Switch B BGP route table:
admin@XorPlus# run show bgp routes ipv6 Status Codes: * valid route, > best route Origin Codes: i IGP, e EGP, ? incomplete Prefix Nexthop Peer AS Path ---------------------------- ------------------------ --------------- ------------ *> 9999::9/128 3003::2 0.0.0.0 ? admin@XorPlus# run show bgp routes ipv6 detail 9999::9/128 From peer: 0.0.0.0 Route: Winner Origin: INCOMPLETE AS Path: Nexthop: 3003::2 Local Preference: 100 admin@XorPlus#
Switch A BGP route table:
admin@XorPlus# run show bgp routes ipv6 Status Codes: * valid route, > best route Origin Codes: i IGP, e EGP, ? incomplete Prefix Nexthop Peer AS Path ---------------------------- ------------------------ --------------- ------------ *> 9999::9/128 3003::1 6.6.6.6 1.1 ? admin@XorPlus# run show bgp routes ipv6 detail 9999::9/128 From peer: 6.6.6.6 Route: Winner Origin: INCOMPLETE AS Path: 1.1 Nexthop: 3003::1 Multiple Exit Discriminator: 0 Local Preference: 100
Case 3
Two Peer All Enable 4-byte-as-number
Figure 1-9
Step 1: Enable 4-Byte-AS-Number on Switch A and Switch B
Switch A:
admin@XorPlus# set protocols bgp enable-4byte-as-numbers true
Switch B:
admin@XorPlus# set protocols bgp enable-4byte-as-numbers true
Step 2: Configure BGP-ID and 4-Byte-AS-Number
Switch A:
admin@XorPlus#set protocols bgp bgp-id 9.9.9.9 admin@XorPlus#set protocols bgp local-as "65536"
Switch B:
admin@XorPlus# set protocols bgp bgp-id 6.6.6.6 admin@XorPlus# set protocols bgp local-as "65537"
Step 3: Configure BGP Peer
Switch A:
admin@XorPlus# set protocols bgp peer 3003::1 local-ip "3003::2" admin@XorPlus# set protocols bgp peer 3003::1 as "65537" admin@XorPlus# set protocols bgp peer 3003::1 ipv6-unicast true
Switch B:
admin@XorPlus# set protocols bgp peer 3003::2 local-ip "3003::1" admin@XorPlus# set protocols bgp peer 3003::2 as "65536" admin@XorPlus# set protocols bgp peer 3003::2 ipv6-unicast true
Step 4: Check BGP Peer Status
Switch A:
admin@XorPlus# run show bgp peers detail 3003::1 Peer 1: local 3003::2/179 remote 3003::1/52689 Peer ID: 6.6.6.6 Peer State: ESTABLISHED Admin State: START Negotiated BGP Version: 4 Peer AS Number: 65537 Updates Received: 1, Updates Sent: 0 Messages Received: 4, Messages Sent: 4 Time since last received update: 32 seconds Number of transitions to ESTABLISHED: 9 Time since last entering ESTABLISHED state: 32 seconds Retry Interval: 120 seconds Hold Time: 90 seconds, Keep Alive Time: 30 seconds Configured Hold Time: 90 seconds, Configured Keep Alive Time: 30 seconds Minimum AS Origination Interval: 0 seconds Minimum Route Advertisement Interval: 0 seconds
Switch B:
admin@XorPlus# run show bgp peers detail 3003::2 Peer 1: local 3003::1/52689 remote 3003::2/179 Peer ID: 9.9.9.9 Peer State: ESTABLISHED Admin State: START Negotiated BGP Version: 4 Peer AS Number: 65536 Updates Received: 0, Updates Sent: 1 Messages Received: 4, Messages Sent: 4 Time since last received update: n/a Number of transitions to ESTABLISHED: 9 Time since last entering ESTABLISHED state: 53 seconds Retry Interval: 120 seconds Hold Time: 90 seconds, Keep Alive Time: 30 seconds Configured Hold Time: 90 seconds, Configured Keep Alive Time: 30 seconds Minimum AS Origination Interval: 0 seconds Minimum Route Advertisement Interval: 0 seconds
Step 5: Switch B distribute one BGP route entry to Switch B, then check the BGP route table:
Switch B BGP route table:
admin@XorPlus# run show bgp routes ipv6 Status Codes: * valid route, > best route Origin Codes: i IGP, e EGP, ? incomplete Prefix Nexthop Peer AS Path ---------------------------- ------------------------ --------------- ------------ *> 9999::9/128 3003::2 0.0.0.0 ? admin@XorPlus# admin@XorPlus# admin@XorPlus# run show bgp routes ipv6 detail 9999::9/128 From peer: 0.0.0.0 Route: Winner Origin: INCOMPLETE AS Path: Nexthop: 3003::2 Local Preference: 100
Switch A BGP route table:
admin@XorPlus# run show bgp routes ipv6 Status Codes: * valid route, > best route Origin Codes: i IGP, e EGP, ? incomplete Prefix Nexthop Peer AS Path ---------------------------- ------------------------ --------------- ------------ *> 9999::9/128 3003::1 6.6.6.6 1.1 ? admin@XorPlus# run show bgp routes ipv6 detail 9999::9/128 From peer: 6.6.6.6 Route: Winner Origin: INCOMPLETE AS Path: 1.1 Nexthop: 3003::1 Multiple Exit Discriminator: 0 Local Preference: 100
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