[EVPN MH][CLI config][CLI show] add support for EVPN MH feature

[dpolishchukgl]

What I did

Added EVPN MH CLI as a part of implementation of EVPN MH feature

How I did it

• added EVPN MH config commands
• added EVPN MH show commands
• added tests

How to verify it

config interface evpn-esi add PortChannel100 type-3 9
config interface sys-mac add PortChannel100 00:11:22:33:44:55
config interface evpn-df-pref add PortChannel100 2345
config interface evpn-uplink Ethernet4 enable 
config evpn-mh startup-delay add 7
config evpn-mh neigh-holdtime add 8
config evpn-mh mac-holdtime add 9

vtysh -c 'show run'
Building configuration...

Current configuration:
!
frr version 8.5.1
frr defaults traditional
hostname sonic
log syslog informational
log facility local4
evpn mh mac-holdtime 9
evpn mh neigh-holdtime 8
evpn mh startup-delay 7
no zebra nexthop kernel enable
fpm address 127.0.0.1
no fpm use-next-hop-groups
agentx
no service integrated-vtysh-config
!
password zebra
enable password zebra
!
interface Ethernet4
 evpn mh uplink
exit
!
interface PortChannel100
 evpn mh es-df-pref 2345
 evpn mh es-id 9
 evpn mh es-sys-mac 00:11:22:33:44:55
exit
!
ip nht resolve-via-default
!
ipv6 nht resolve-via-default
!
end

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)

• show vxlan ethernet-segment

+--------------+------+---------+-------+
| Interface    | DF   | Peers   |   NHG |
+==============+======+=========+=======+
| PortChannel5 | NDF  | 2.2.2.2 |    10 |
|              |      | 4.5.6.7 |       |
+--------------+------+---------+-------+
| PortChannel6 | DF   | 1.1.1.1 |    20 |
|              |      | 3.3.3.3 |       |
+--------------+------+---------+-------+

• show vxlan l2-nexthop-group

+-------+-----------+----------------+
|   NHG | Tunnels   | LocalMembers   |
+=======+===========+================+
|    10 |           | 20,30,40       |
+-------+-----------+----------------+
|    20 | 2.3.4.5   | PortChannel5   |
+-------+-----------+----------------+
|    30 | 2.3.4.6   | PortChannel6   |
+-------+-----------+----------------+

• show evpn route

Namespace: default
BGP table version is 9, local router ID is 10.127.127.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
EVPN type-1 prefix: [1]:[EthTag]:[ESI]:[IPlen]:[VTEP-IP]:[Frag-id]
EVPN type-2 prefix: [2]:[EthTag]:[MAClen]:[MAC]:[IPlen]:[IP]
EVPN type-3 prefix: [3]:[EthTag]:[IPlen]:[OrigIP]
EVPN type-4 prefix: [4]:[ESI]:[IPlen]:[OrigIP]
EVPN type-5 prefix: [5]:[EthTag]:[IPlen]:[IP]

   Network          Next Hop            Metric LocPrf Weight Path
                    Extended Community
Route Distinguisher: 10.127.127.1:2
 *> [1]:[0]:[03:00:11:22:33:44:55:00:00:64]:[128]:[::]:[0]
                    10.127.127.1                       32768 i
                    ET:8 RT:65100:1000
 *> [2]:[0]:[48]:[0c:fc:27:4c:00:00]
                    10.127.127.1                       32768 i
                    ET:8 RT:65100:1000
 *> [3]:[0]:[32]:[10.127.127.1]
                    10.127.127.1                       32768 i
                    ET:8 RT:65100:1000
Route Distinguisher: 10.127.127.1:3
 *> [1]:[4294967295]:[03:00:11:22:33:44:55:00:00:64]:[128]:[::]:[0]
                    10.127.127.1                       32768 i
                    ET:8 ESI-label-Rt:AA RT:65100:1000
 *> [4]:[03:00:11:22:33:44:55:00:00:64]:[32]:[10.127.127.1]
                    10.127.127.1                       32768 i
                    ET:8 ES-Import-Rt:00:11:22:33:44:55 DF: (alg: 2, pref: 32767)
Route Distinguisher: 10.127.127.3:2
 *>i[2]:[0]:[48]:[0c:ef:c9:7e:00:01]
                    10.127.127.3                  100      0 i
                    RT:65100:1000 ET:8
 *>i[2]:[0]:[48]:[0c:ef:c9:7e:00:01]:[128]:[fe80::eef:c9ff:fe7e:1]
                    10.127.127.3                  100      0 i
                    RT:65100:1000 ET:8
 *>i[3]:[0]:[32]:[10.127.127.3]
                    10.127.127.3                  100      0 i
                    RT:65100:1000 ET:8

Displayed 8 prefixes (8 paths)

• show evpn es

Type: L local, R remote, N non-DF
ESI                            Type    ES Interface    status    Peers
-----------------------------  ------  --------------  --------  -------
00:11:22:33:44:55:66:77:88:99  R       -               down      1.1.1.1
                                                                 2.2.2.2

• show evpn es-evi

Flags: L local, R remote, I inconsistent
VTEP-Flags: E EAD-per-ES, V EAD-per-EVI
VNI    ESI                            Flags    VTEPs
-----  -----------------------------  -------  -----------
1000   00:11:22:33:44:55:66:77:88:99  R        1.1.1.1(VE)
                                               2.2.2.2(VE)

• show evpn es --detail

ESI: 00:11:22:33:44:55:66:77:88:99
 Type: Remote
 Interface: -
 State: down
 DF status: is DF
 DF preference: 0
 Nexthop group: 536870913
 VTEPs:
     1.1.1.1 df_alg: - df_pref: - nh: 268435458 
     2.2.2.2 df_alg: - df_pref: - nh: 268435459 

• show evpn route --type 1

Namespace: default
BGP table version is 8, local router ID is 3.3.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
EVPN type-1 prefix: [1]:[EthTag]:[ESI]:[IPlen]:[VTEP-IP]:[Frag-id]
EVPN type-2 prefix: [2]:[EthTag]:[MAClen]:[MAC]:[IPlen]:[IP]
EVPN type-3 prefix: [3]:[EthTag]:[IPlen]:[OrigIP]
EVPN type-4 prefix: [4]:[ESI]:[IPlen]:[OrigIP]
EVPN type-5 prefix: [5]:[EthTag]:[IPlen]:[IP]

   Network          Next Hop            Metric LocPrf Weight Path
                    Extended Community
Route Distinguisher: 1.1.1.1:2
 *> [1]:[0]:[00:11:22:33:44:55:66:77:88:99]:[32]:[0.0.0.0]:[0]
                    1.1.1.1                                0 65100 64101 i
                    RT:64101:1000 ET:8
Route Distinguisher: 1.1.1.1:3
 *> [1]:[4294967295]:[00:11:22:33:44:55:66:77:88:99]:[32]:[0.0.0.0]:[0]
                    1.1.1.1                                0 65100 64101 i
                    RT:64101:1000 ET:8 ESI-label-Rt:AA
Route Distinguisher: 2.2.2.2:2
 *> [1]:[0]:[00:11:22:33:44:55:66:77:88:99]:[32]:[0.0.0.0]:[0]
                    2.2.2.2                                0 65100 64102 i
                    RT:64102:1000 ET:8
Route Distinguisher: 2.2.2.2:3
 *> [1]:[4294967295]:[00:11:22:33:44:55:66:77:88:99]:[32]:[0.0.0.0]:[0]
                    2.2.2.2                                0 65100 64102 i
                    RT:64102:1000 ET:8 ESI-label-Rt:AA

Displayed 4 prefixes (4 paths) (of requested type)

Depends on

sonic-net/sonic-buildimage#19491