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[multi-asic] fix network command for internal ipv6 loopback #7878

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Merged
merged 1 commit into from
Jun 24, 2021
Merged

[multi-asic] fix network command for internal ipv6 loopback #7878

merged 1 commit into from
Jun 24, 2021

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arlakshm
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Signed-off-by: Arvindsrinivasan Lakshmi Narasimhan [email protected]

Why I did it

In the multi asic platforms all the ASIC are advertising the same IPv6 /64 network from Loopback4096.
Therefore, the IPv6 loopback address of backend asic is not learnt on the frontend asic.
Change this to advertise the Loopback4096 address as /128

How I did it

Change the bgpd.conf.main.conf.j2 template file.

How to verify it

Verify the route to Loopback4096 address of backend asic is programmed on the Frontend linecard

  • Loopback4096 ipv6 address on backend asics
admin@sonic:~$ show ipv6 int -d all -n asic4 | grep -i loopback4096
Loopback4096               2603:10e2:400::4/128                       up/up         N/A             N/A
                           fe80::fc68:56ff:fe3a:7f37%Loopback4096/64                N/A             N/A
admin@sonic:~$ show ipv6 int -d all -n asic5 | grep -i loopback4096
Loopback4096               2603:10e2:400::5/128                       up/up         N/A             N/A
                           fe80::705c:bbff:fec5:1c36%Loopback4096/64                N/A             N/A
admin@sonic:~$

Verify the route is programmed in the hardware for these addresses

admin@sonic:~$ bcmcmd -n 0 "l3 ip6route show" | grep 2603:10e2:0400:0000:0000:0000:0000
27    0        2603:10e2:0400:0000:0000:0000:0000:0000/128  00:00:00:00:00:00 100003    0     0     0    1 n
65565 0        2603:10e2:0400:0000:0000:0000:0000:0002/128  00:00:00:00:00:00 200258    0     0     0    0 n      (ECMP)
30    0        2603:10e2:0400:0000:0000:0000:0000:0003/128  00:00:00:00:00:00 200258    0     0     0    0 n      (ECMP)
65566 0        2603:10e2:0400:0000:0000:0000:0000:0005/128  00:00:00:00:00:00 100008    0     0     0    0 n
31    0        2603:10e2:0400:0000:0000:0000:0000:0001/128  00:00:00:00:00:00 200258    0     0     0    0 n      (ECMP)
65567 0        2603:10e2:0400:0000:0000:0000:0000:0004/128  00:00:00:00:00:00 100009    0     0     0    0 n

Which release branch to backport (provide reason below if selected)

  • 201811
  • [x ] 201911
  • [ x] 202006
  • [x ] 202012

Description for the changelog

A picture of a cute animal (not mandatory but encouraged)

@arlakshm
fix network command for internal loopback
d43ee08 
Signed-off-by: Arvindsrinivasan Lakshmi Narasimhan <[email protected]>
@arlakshm arlakshm requested a review from lguohan as a code owner June 15, 2021 15:47
@arlakshm arlakshm requested a review from abdosi June 15, 2021 15:47
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abdosi commented Jun 15, 2021

/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

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/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

@arlakshm arlakshm mentioned this pull request Jun 15, 2021
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/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

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/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

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/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

@arlakshm arlakshm merged commit ef67ba5 into sonic-net:master Jun 24, 2021
@arlakshm arlakshm deleted the masic_ipv6_lpbk_fix branch June 24, 2021 19:02
carl-nokia pushed a commit to carl-nokia/sonic-buildimage that referenced this pull request Aug 7, 2021
@arlakshm
[multi-asic] fix network command for internal loopback (sonic-net#7878)
675b97c 
Signed-off-by: Arvindsrinivasan Lakshmi Narasimhan <[email protected]>
In the multi asic platforms all the ASIC are advertising the same IPv6 /64 network from Loopback4096.
Therefore, the IPv6 loopback address of backend asic is not learnt on the frontend asic.
Change the bgpd.conf.main.conf.j2 template file to advertise the Loopback4096 ipv6 address as /128
qiluo-msft pushed a commit that referenced this pull request Feb 9, 2022
@arlakshm @qiluo-msft
[multi-asic] fix network command for internal loopback (#7878)
14bbccc 
Signed-off-by: Arvindsrinivasan Lakshmi Narasimhan <[email protected]>
In the multi asic platforms all the ASIC are advertising the same IPv6 /64 network from Loopback4096.
Therefore, the IPv6 loopback address of backend asic is not learnt on the frontend asic.
Change the bgpd.conf.main.conf.j2 template file to advertise the Loopback4096 ipv6 address as /128
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@abdosi abdosi abdosi approved these changes

@lguohan lguohan Awaiting requested review from lguohan lguohan is a code owner

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@arlakshm @abdosi @qiluo-msft @judyjoseph @wenyiz2021