NOTE
- AFモードを利用
- PE上で EIGRP – BGP IPv4 – BGP VPNv4 と再配送されるイメージになる
- PE同士のEIGRP ASが同じ場合、VPN越しのEIGRPは同一ドメインとして扱い、internalになる
- PE同士のEIGRP ASが違う場合、VPN越しのEIGRPは別ドメインとして扱い、externalになる
- EIGRPの場合は以下をBGPコミュニティとして伝搬する
0x8800 Flag と Tag
0x8801 AS と Delay
0x8802 信頼性、ネクストホップ、帯域
0x8803 (予約)、負荷、MTU
0x8804 EIGRPの外部AS番号とID
0x8805 EIGRPの外部プロトコルとメトリック
DIAGRAM
VERIFICATION
R3#sh bgp vpnv4 uni vrf VPN-A 10.4.6.0/24 BGP routing table entry for 65000:65100:10.4.6.0/24, version 10 Paths: (1 available, best #1, table VPN-A) Not advertised to any peer Refresh Epoch 2 Local 10.0.0.2 (metric 3) (via default) from 10.0.0.1 (10.0.0.1) Origin incomplete, metric 15360, localpref 100, valid, internal, best Extended Community: RT:65000:65100 Cost:pre-bestpath:128:15360 0x8800:32768:0 0x8801:65100:512 0x8802:65281:2560 0x8803:65281:1500 0x8806:0:167772164 Originator: 10.0.0.2, Cluster list: 10.0.0.1 mpls labels in/out nolabel/19 rx pathid: 0, tx pathid: 0x0 R3# R3#sh bgp vpnv4 uni vrf VPN-A 192.168.6.0/24 BGP routing table entry for 65000:65100:192.168.6.0/24, version 11 Paths: (1 available, best #1, table VPN-A) Not advertised to any peer Refresh Epoch 2 Local 10.0.0.2 (metric 3) (via default) from 10.0.0.1 (10.0.0.1) Origin incomplete, metric 16000, localpref 100, valid, internal, best Extended Community: RT:65000:65100 Cost:pre-bestpath:129:16000 0x8800:0:0 0x8801:65100:544 0x8802:65282:2560 0x8803:65281:1500 0x8804:0:167772166 0x8805:11:0 0x8806:0:167772166 Originator: 10.0.0.2, Cluster list: 10.0.0.1 mpls labels in/out nolabel/20 rx pathid: 0, tx pathid: 0x0 R3#
CONFIGURATION
router eigrp CCIE ! address-family ipv4 unicast vrf VPN-A autonomous-system 65000 ! topology base redistribute bgp 65000 metric 100000 10 255 1 1500 exit-af-topology network 172.16.35.3 0.0.0.0 eigrp router-id 10.0.0.3 exit-address-family ! router bgp 65000 address-family ipv4 vrf VPN-A redistribute eigrp 65000 exit-address-family
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