■Cisco IOU L3でEIGRPスタブ検証環境を追加する。
今回の拡張分のルータを起動して、
IOUルータ7台、IOUスイッチ1台、Ethernet switch1台、FrameRelay1台の環境でも、
CPU(1.8%)、RAM(22.4%)と安定しているので、まだまだ増やせそう。
Cisco IOU L3でEIGRP検証環境を作ってみる。
http://labunix.hateblo.jp/entry/20180725/1532448140
■管理用のtelnetを構成する。
$ for n in `seq 31 34`;do \
echo "[R$(($n%30))]"; \
echo -e "conf t"; \
echo -e "int e$(($n%30/4))/$(($n%30%4))"; \
echo -e "ip address 192.168.0.${n}" 255.255.255.0; \
echo "no shut"; \
echo -e "enable password cisco\nline vty 0 4\npassword cisco\ntransport input telnet"; \
echo -e "end\nwrite mem\n";
done
[R1]
conf t
int e0/1
ip address 192.168.0.31 255.255.255.0
no shut
enable password cisco
line vty 0 4
password cisco
transport input telnet
end
write mem
[R2]
conf t
int e0/2
ip address 192.168.0.32 255.255.255.0
no shut
enable password cisco
line vty 0 4
password cisco
transport input telnet
end
write mem
[R3]
conf t
int e0/3
ip address 192.168.0.33 255.255.255.0
no shut
enable password cisco
line vty 0 4
password cisco
transport input telnet
end
write mem
[R4]
conf t
int e1/0
ip address 192.168.0.34 255.255.255.0
no shut
enable password cisco
line vty 0 4
password cisco
transport input telnet
end
write mem
■socatで別のサーバからつなげる場合。
$ for n in `seq 31 34`;do socat tcp-listen:${n}23,fork tcp-connect:192.168.0.${n}:23 & done
■それ以外はtelnetがつながるので地道に。
R1#show run | section interface Serial2/0
interface Serial2/0
ip address 10.2.1.1 255.255.255.0
serial restart-delay 0
R2#show run | section interface Ethernet0/0|interface Serial2/0
interface Ethernet0/0
ip address 10.2.2.2 255.255.255.0
interface Serial2/0
ip address 10.2.1.2 255.255.255.0
serial restart-delay 0
R3#show run | section interface Ethernet0/0|interface Serial2/0|interface Ethernet0/3
interface Ethernet0/0
ip address 172.16.1.1 255.255.255.0
interface Ethernet0/3
ip address 192.168.0.33 255.255.255.0
interface Serial2/0
ip address 10.2.3.3 255.255.255.0
serial restart-delay 0
R4#show run | section interface Ethernet0/0|interface Serial2/0
interface Ethernet0/0
ip address 10.2.2.4 255.255.255.0
interface Serial2/0
ip address 10.2.3.4 255.255.255.0
serial restart-delay 0
■R1,R2,R3,R4を、EIGRP AS 65000で構成する。
R4#show run | section router
router eigrp 65000
network 10.0.0.0
network 172.16.0.0
■ルーティングテーブルを確認
R1#show ip route eigrp
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
D 10.2.2.0/24 [90/2195456] via 10.2.1.2, 17:13:43, Serial2/0
D 10.2.3.0/24 [90/2707456] via 10.2.1.2, 17:13:20, Serial2/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2733056] via 10.2.1.2, 00:06:57, Serial2/0
R2#show ip route eigrp
...
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
D 10.2.3.0/24 [90/2195456] via 10.2.2.4, 17:14:04, Ethernet0/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2221056] via 10.2.2.4, 00:07:41, Ethernet0/0
R3#show ip route eigrp
...
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
D 10.2.1.0/24 [90/2707456] via 10.2.3.4, 00:07:42, Serial2/0
D 10.2.2.0/24 [90/2195456] via 10.2.3.4, 00:07:42, Serial2/0
R4#show ip route eigrp
...
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
D 10.2.1.0/24 [90/2195456] via 10.2.2.2, 17:14:07, Ethernet0/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2195456] via 10.2.3.3, 00:07:44, Serial2/0
■R1とR3にパッシブインターフェイスを設定する。
R1とR3の違いを確認する。
R1#show run | section eigrp
router eigrp 65000
network 10.0.0.0
network 172.16.0.0
passive-interface default
no passive-interface Serial2/0
R1# show ip protocols | section Passive
R3#show run | section eigrp
router eigrp 65000
network 10.0.0.0
network 172.16.0.0
passive-interface default
no passive-interface Serial2/0
R3#show ip protocols | section Passive
Passive Interface(s):
Ethernet0/0
■R2とR4でインターフェイス単位のEIGRP経路集約を手動で設定する。
R2#show run | section router|interface Serial2/0
interface Serial2/0
ip address 10.2.1.2 255.255.255.0
ip summary-address eigrp 65000 10.2.0.0 255.255.0.0
serial restart-delay 0
router eigrp 65000
network 10.0.0.0
network 172.16.0.0
R2#show ip route eigrp
...
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 6 subnets, 3 masks
D 10.2.0.0/16 is a summary, 00:01:41, Null0
D 10.2.3.0/24 [90/2195456] via 10.2.2.4, 17:50:49, Ethernet0/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2221056] via 10.2.2.4, 00:30:57, Ethernet0/0
R2#show ip protocols | section Summar
Automatic Summarization: disabled
Address Summarization:
10.2.0.0/16 for Se2/0
Summarizing 3 components with metric 281600
R1
...
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 3 subnets, 3 masks
D 10.2.0.0/16 [90/2195456] via 10.2.1.2, 00:01:57, Serial2/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2733056] via 10.2.1.2, 00:30:22, Serial2/0
R4
interface Serial2/0
ip address 10.2.3.4 255.255.255.0
ip summary-address eigrp 65000 10.2.0.0 255.255.0.0
serial restart-delay 0
router eigrp 65000
network 10.0.0.0
network 172.16.0.0
R4
...
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 6 subnets, 3 masks
D 10.2.0.0/16 is a summary, 00:02:35, Null0
D 10.2.1.0/24 [90/2195456] via 10.2.2.2, 17:52:14, Ethernet0/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2195456] via 10.2.3.3, 00:32:22, Serial2/0
R4
Automatic Summarization: disabled
Address Summarization:
10.2.0.0/16 for Se2/0
Summarizing 3 components with metric 281600
R3
...
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 3 subnets, 3 masks
D 10.2.0.0/16 [90/2195456] via 10.2.3.4, 00:03:05, Serial2/0
■R2とR4でEIGRP自動集約に変更してみる。
クラスフル間ではないので、「is a summary」もなく、経路も集約されない。
conf t
router eigrp 65000
auto-summary
int s2/0
no ip summary-address eigrp 65000 10.2.0.0 255.255.0.0
end
write mem
R2
Automatic Summarization: enabled
R4
Automatic Summarization: enabled
■R2とR4でEIGRP手動集約に戻す。
conf t
router eigrp 65000
no auto-summary
int s2/0
ip summary-address eigrp 65000 10.2.0.0 255.255.0.0
end
write mem
■R1とR3をEIGRPスタブに変更する。
conf t
router eigrp 65000
eigrp stub
end
write mem
R1
Stub, connected, summary
R3
Stub, connected, summary
R2
EIGRP-IPv4 Neighbors for AS(65000)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 10.2.1.1 Se2/0 10 00:02:12 18 108 0 35
Version 18.0/2.0, Retrans: 0, Retries: 0
Topology-ids from peer - 0
Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
1 10.2.2.4 Et0/0 12 18:25:22 6 100 0 59
Time since Restart 00:09:36
Version 18.0/2.0, Retrans: 1, Retries: 0, Prefixes: 2
Topology-ids from peer - 0
Max Nbrs: 0, Current Nbrs: 0
R4
EIGRP-IPv4 Neighbors for AS(65000)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
1 10.2.3.3 Se2/0 14 00:02:27 21 126 0 31
Version 18.0/2.0, Retrans: 0, Retries: 0, Prefixes: 1
Topology-ids from peer - 0
Stub Peer Advertising (CONNECTED SUMMARY ) Routes
Suppressing queries
0 10.2.2.2 Et0/0 11 18:25:41 7 100 0 67
Time since Restart 00:09:55
Version 18.0/2.0, Retrans: 2, Retries: 0, Prefixes: 1
Topology-ids from peer - 0
Max Nbrs: 0, Current Nbrs: 0
■R1はreceive-onlyオプションを追加する。
R1
Stub, receive-only
R2
...
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 6 subnets, 3 masks
D 10.2.0.0/16 is a summary, 00:19:09, Null0
D 10.2.3.0/24 [90/2195456] via 10.2.2.4, 18:34:53, Ethernet0/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2221056] via 10.2.2.4, 00:11:41, Ethernet0/0
■R2には経路集約が要らなくなったので削除
conf t
router eigrp 65000
int s2/0
no ip summary-address eigrp 65000 10.2.0.0 255.255.0.0
end
write mem
R2
Automatic Summarization: disabled
R2
...
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
D 10.2.3.0/24 [90/2195456] via 10.2.2.4, 18:39:06, Ethernet0/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2221056] via 10.2.2.4, 00:15:54, Ethernet0/0
R2
C 10.2.1.0/24 is directly connected, Serial2/0
L 10.2.1.2/32 is directly connected, Serial2/0
■ルーティングテーブルを追ってみる。
R3
D 10.2.0.0/16 [90/2195456] via 10.2.3.4, 00:19:36, Serial2/0
R4
D 10.2.0.0/16 is a summary, 00:27:34, Null0
D 10.2.1.0/24 [90/2195456] via 10.2.2.2, 18:43:16, Ethernet0/0
R2
C 10.2.1.0/24 is directly connected, Serial2/0
L 10.2.1.2/32 is directly connected, Serial2/0
R1
C 10.2.1.0/24 is directly connected, Serial2/0
L 10.2.1.1/32 is directly connected, Serial2/0
D 10.2.2.0/24 [90/2195456] via 10.2.1.2, 00:07:05, Serial2/0
D 10.2.3.0/24 [90/2707456] via 10.2.1.2, 00:07:05, Serial2/0
D 172.16.1.0 [90/2733056] via 10.2.1.2, 00:15:31, Serial2/0
R3
Type escape sequence to abort.
Tracing the route to 10.2.1.1
VRF info: (vrf in name/id, vrf out name/id)
1 10.2.3.4 9 msec 8 msec 8 msec
2 10.2.2.2 9 msec 9 msec 8 msec
3 10.2.1.1 14 msec 18 msec 14 msec
R1
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2733056] via 10.2.1.2, 00:19:03, Serial2/0
R2
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2221056] via 10.2.2.4, 00:24:09, Ethernet0/0
R4
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2195456] via 10.2.3.3, 00:24:07, Serial2/0
R3
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.16.1.0/24 is directly connected, Ethernet0/0
L 172.16.1.1/32 is directly connected, Ethernet0/0
R1
Type escape sequence to abort.
Tracing the route to 172.16.1.1
VRF info: (vrf in name/id, vrf out name/id)
1 10.2.1.2 9 msec 9 msec 9 msec
2 10.2.2.4 9 msec 9 msec 9 msec
3 10.2.3.3 17 msec 14 msec 18 msec