EFA auto allocates VRF RT in the format xx:yy.
EFA auto allocates VRF RD in the format
<router-id>:<lowest-yy-of-rt-in-a-given-vrf>.
If users have not provided explicit RT values, then EFA uniquely allocates the RT values for each VRF. Since RD allocation is based on the RT value, EFA uniquely allocates the RD value for each VRF.
But if users provide RT values (in the format xx:yy and yy is common across multiple VRFs), then the RD which is derived based on the yy (<router-id>:<lowest-yy-of-rt>), cannot be unique across the VRFs and hence results in the failure indicating multiple VRFs cannot have common RD.
efa tenant vrf create --tenant "ten1" --name "ten1vrf1" --routing-type "distributed" --rt-type export --rt 65010:1 --rt-type import --rt 65010:2 --max-path 8 --redistribute connected efa tenant vrf create --tenant "ten1" --name "ten1vrf2" --routing-type "distributed" --rt-type export --rt 65010:2 --rt-type import --rt 65010:1 --max-path 8 --redistribute connected efa tenant epg create --tenant "ten1" --name "ten1epg1" --type extension --switchport-mode trunk --single-homed-bfd-session-type auto --po ten1po1 --vrf ten1vrf1 --ctag-range 25 --l3-vni 32821 --anycast-ip 25:10.0.21.1/24 --ctag-description "25:Tenant L3 Extended VLAN" --l2-vni 25:32770 --suppress-arp 25:true --suppress-nd 25:false efa tenant epg create --tenant "ten1" --name "ten1epg2" --type extension --switchport-mode trunk --single-homed-bfd-session-type auto --po ten1po1 --vrf ten1vrf2 --ctag-range 26 --l3-vni 32823 --anycast-ip 26:11.0.21.1/24 --ctag-description "26:Tenant L3 Extended VLAN" --l2-vni 26:32771 --suppress-arp 26:true --suppress-nd 26:false Device: 10.20.246.15 Network Policy Error: Vrf ten1vrf2 creation failed due to netconf rpc [error] '% Error: This RD is already configured for another VRF', Device: 10.20.246.16 Network Policy Error: Vrf ten1vrf2 creation failed due to netconf rpc [error] '% Error: This RD is already configured for another VRF',
EFA auto allocates VRF RT in the format xx:yy
EFA auto allocates VRF RD in the format <router-id>:<unique-number-per-vrf-independent-of-rt>
Since RD value has no relation to yy value of RT anymore, and since EFA auto allocates the unique-number-per-vrf which is appended to the router-id, the uniqueness of RD is always guaranteed.
efa tenant vrf create --tenant "ten1" --name "ten1vrf1" --routing-type "distributed" --rt-type export --rt 65010:1 --rt-type import --rt 65010:2 --max-path 8 --redistribute connected efa tenant vrf create --tenant "ten1" --name "ten1vrf2" --routing-type "distributed" --rt-type export --rt 65010:2 --rt-type import --rt 65010:1 --max-path 8 --redistribute connected efa tenant epg create --tenant "ten1" --name "ten1epg1" --type extension --switchport-mode trunk --single-homed-bfd-session-type auto --po ten1po1 --vrf ten1vrf1 --ctag-range 25 --l3-vni 32821 --anycast-ip 25:10.0.21.1/24 --ctag-description "25:Tenant L3 Extended VLAN" --l2-vni 25:32770 --suppress-arp 25:true --suppress-nd 25:false efa tenant epg create --tenant "ten1" --name "ten1epg2" --type extension --switchport-mode trunk --single-homed-bfd-session-type auto --po ten1po1 --vrf ten1vrf2 --ctag-range 26 --l3-vni 32823 --anycast-ip 26:11.0.21.1/24 --ctag-description "26:Tenant L3 Extended VLAN" --l2-vni 26:32771 --suppress-arp 26:true --suppress-nd 26:false
Rack1-Device1# show running-config vrf vrf ten1vrf1 rd 172.31.254.40:1 evpn irb ve 8192 address-family ipv4 unicast route-target export 65010:1 evpn route-target import 65010:2 evpn ! address-family ipv6 unicast route-target export 65010:1 evpn route-target import 65010:2 evpn ! ! vrf ten1vrf2 rd 172.31.254.40:2 evpn irb ve 8190 address-family ipv4 unicast route-target export 65010:2 evpn route-target import 65010:1 evpn ! address-family ipv6 unicast route-target export 65010:2 evpn route-target import 65010:1 evpn ! |
Rack1-Device2# show running-config vrf vrf ten1vrf1 rd 172.31.254.209:1 evpn irb ve 8192 address-family ipv4 unicast route-target export 65010:1 evpn route-target import 65010:2 evpn ! address-family ipv6 unicast route-target export 65010:1 evpn route-target import 65010:2 evpn ! ! vrf ten1vrf2 rd 172.31.254.209:2 evpn irb ve 8190 address-family ipv4 unicast route-target export 65010:2 evpn route-target import 65010:1 evpn ! address-family ipv6 unicast route-target export 65010:2 evpn route-target import 65010:1 evpn ! |