任务是删除上一次配置 没什么可说了,拓扑图以及实际用路由器名与书上路由器名对应关系,请查看[原创]BSCI第一章实验2之任务2(人邮自学指南BSCI)
未关闭S1前 R1
r1-2514#show ip route
Codes: 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
Gateway of last resort is not set
C 1.0.0.0/8 is directly connected, Loopback0
D 2.0.0.0/8 [90/2297856] via 172.31.1.2, 00:00:59, Serial0
[90/2297856] via 10.1.0.2, 00:00:59, Serial1
D 3.0.0.0/8 [90/409600] via 10.1.1.3, 00:45:56, Ethernet0
D 4.0.0.0/8 [90/2323456] via 10.1.1.3, 00:00:59, Ethernet0
[90/2323456] via 172.31.1.2, 00:00:59, Serial0
[90/2323456] via 10.1.0.2, 00:00:59, Serial1
172.31.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.31.1.0/24 is directly connected, Serial0
D 172.31.0.0/16 is a summary, 00:01:01, Null0
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
D 10.1.3.0/24 [90/2195456] via 10.1.1.3, 00:01:01, Ethernet0
D 10.1.2.0/24 [90/2195456] via 10.1.0.2, 00:01:01, Serial1
C 10.1.1.0/24 is directly connected, Ethernet0
D 10.0.0.0/8 is a summary, 00:41:22, Null0
C 10.1.0.0/24 is directly connected, Serial1
关闭S1后的r1
r1-2514#show ip route
Codes: 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
Gateway of last resort is not set
C 1.0.0.0/8 is directly connected, Loopback0
D 2.0.0.0/8 [90/2297856] via 172.31.1.2, 00:00:10, Serial0
D 3.0.0.0/8 [90/409600] via 10.1.1.3, 00:00:10, Ethernet0
D 4.0.0.0/8 [90/2323456] via 172.31.1.2, 00:00:10, Serial0
[90/2323456] via 10.1.1.3, 00:00:10, Ethernet0
172.31.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.31.1.0/24 is directly connected, Serial0
D 172.31.0.0/16 is a summary, 00:00:10, Null0
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
D 10.1.3.0/24 [90/2195456] via 10.1.1.3, 00:00:11, Ethernet0
D 10.1.2.0/24 [90/2221056] via 10.1.1.3, 00:00:11, Ethernet0
C 10.1.1.0/24 is directly connected, Ethernet0
D 10.0.0.0/8 is a summary, 00:00:11, Null0
未关闭R1-S1前R3
r3-2514#
*Mar 1 01:25:48.275: IP-EIGRP(Default-IP-Routing-Table:1): Neighbor 10.1.2.4 not on common subnet for Ethernet0
r3-2514#show ip route
Codes: 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
Gateway of last resort is not set
D 1.0.0.0/8 [90/409600] via 10.1.1.1, 01:11:19, Ethernet0
D 2.0.0.0/8 [90/2323456] via 10.1.1.1, 00:42:18, Ethernet0
[90/2323456] via 10.1.3.4, 00:42:18, Serial1
C 3.0.0.0/8 is directly connected, Loopback0
D 4.0.0.0/8 [90/2297856] via 10.1.3.4, 01:09:32, Serial1
D 172.31.0.0/16 [90/2195456] via 10.1.1.1, 00:42:19, Ethernet0
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C 10.1.3.0/24 is directly connected, Serial1
D 10.1.2.0/24 [90/2195456] via 10.1.3.4, 00:02:04, Serial1
C 10.1.1.0/24 is directly connected, Ethernet0
D 10.0.0.0/8 is a summary, 01:10:59, Null0
D 10.1.0.0/24 [90/2195456] via 10.1.1.1, 00:02:06, Ethernet0
关闭R1-S1后的R3
r3-2514#show ip route
Codes: 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
Gateway of last resort is not set
D 1.0.0.0/8 [90/409600] via 10.1.1.1, 01:28:15, Ethernet0
D 2.0.0.0/8 [90/2323456] via 10.1.1.1, 00:59:14, Ethernet0
[90/2323456] via 10.1.3.4, 00:59:14, Serial1
C 3.0.0.0/8 is directly connected, Loopback0
D 4.0.0.0/8 [90/2297856] via 10.1.3.4, 01:26:28, Serial1
D 172.31.0.0/16 [90/2195456] via 10.1.1.1, 00:59:14, Ethernet0
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 10.1.3.0/24 is directly connected, Serial1
D 10.1.2.0/24 [90/2195456] via 10.1.3.4, 00:19:00, Serial1
C 10.1.1.0
/24 is directly connected,
Ethernet0
D 10.0.0.0/8 is a summary, 01:27:54, Null0
注意上面有个汇总路由,这是自动出来的,EIGRP在汇总路由时总会产生一条指向NULL0接口的路由,这样避免在某些情况下,产生路由环路.比如有一个目标网络是汇总网络里的一个未知子网,此时如果存在默认路由指向发来数据包的路由器,那么这个时候如果没有指向NULL0的这条路由,路由器将把数据包通过默认路由发回原路由器了,产生了环路.而有了指向NULL0接口的这个路由,路由器会匹配它并丢到NULL0上,也就丢弃了数据包.
关闭前R1 到10.1.2.0是通过R2---目标
关闭后R1 到10.1.2.0是通过R3--R4---目标
关闭前R3 到10.1.2.0是通过R4---目标
关闭后R3 到10.1.2.0是通过R4---目标
最终R3无到达10.1.0.0/24的网络
关闭后R3上调试信息:
2509rj#3
[Resuming connection 3 to r3 ... ]
*Mar 1 01:12:23.507: IP-EIGRP(Default-IP-Routing-Table:1): Processing incoming QUERY packet
*Mar 1 01:12:23.511: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 M 4294967295 - 0 4294967295 SM 4294967295 - 0 4294967295
*Mar 1 01:12:23.515: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.2.0/24 M 4294967295 - 1657856 4294967295 SM 4294967295 - 1657856 4294967295
R1路由器向R3发起了2个网络的查询,用4294967295表示我不可达这个网络,你有无去往的路径.
*Mar 1 01:12:23.531: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 metric 4294967295 - 0 4294967295
*Mar 1 01:12:23.539: IP-EIGRP(Default-IP-Routing-Table:1): 10.1.0.0/24 - do advertise out Serial1 '自己无FS于是自己继续向邻居查询
*Mar 1 01:12:23.543: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 metric 4294967295 - 0 4294967295
*Mar 1 01:12:23.555: IP-EIGRP(Default-IP-Routing-Table:1): Processing incoming UPDATE packet
*Mar 1 01:12:23.559: IP-EIGRP(Default-IP-Routing-Table:1): Int 2.0.0.0/8 M 2323456 - 1657856
665600 SM 2297856 - 1657856 640000
*Mar 1 01:12:23.563: IP-EIGRP(Default-IP-Routing-Table:1): Int 4.0.0.0/8 M 4294967295 - 1657856 4294967295 SM 4294967295 - 1657856 4294967295
*Mar 1 01:12:23.587: IP-EIGRP(Default-IP-Routing-Table:1): 10.1.2.0/24 - do advertise out Ethernet0
*Mar 1 01:12:23.595: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.2.0/24 metric 2195456 - 1657856 537600
*Mar 1 01:12:23.603: IP-EIGRP(Default-IP-Routing-Table:1): Processing incoming REPLY packet
*Mar 1 01:12:23.607: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 M 2707456 - 1657856 1049600 SM 2195456 - 1657856 537600
*Mar 1 01:12:23.627: IP-EIGRP(Default-IP-Routing-Table:1): Processing incoming REPLY packet
*Mar 1 01:12:23.631: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 M 4294967295 - 0 4294967295 SM 4294967295 - 0 4294967295
*Mar 1 01:12:23.639: IP-EIGRP(Default-IP-Routing-Table:1): 10.1.0.0/24 routing table not updated thru 10.1.1.1
*Mar 1 01:12:23.663: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 metric 2707456 - 1657856 1049600
*Mar 1 01:12:23.671: IP-EIGRP(Default-IP-Routing-Table:1): 10.1.0.0/24 - do advertise out Ethernet0
*Mar 1 01:12:23.675: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 metric 2707456 - 1657856 1049600
*Mar 1 01:12:23.695: IP-EIGRP(Default-IP-Routing-Table:1): Processing incoming UPDATE packet
*Mar 1 01:12:23.699: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.2.0/24 M 4294967295 - 1657856 4294967295 SM 4294967295 - 1657856 4294967295
*Mar 1 01:12:23.719: IP-EIGRP(Default-IP-Routing-Table:1): 10.1.0.0/24 - do advertise out Ethernet0
*Mar 1 01:12:23.723: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 metric 2707456 - 1657856 1049600
*Mar 1 01:12:23.735: IP-EIGRP(Default-IP-Routing-Table:1): Processing incoming UPDATE packet
*Mar 1 01:12:23.739: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 M 4294967295 - 1657856 4294967295 SM 4294967295 - 1657856 4294967295
*Mar 1 01:12:25.575: IP-EIGRP(Default-IP-Routing-Table:1): Processing incoming QUERY packet
*Mar 1 01:12:25.579: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 M 4294967295 - 0 4294967295 SM 4294967295 - 0 4294967295
*Mar 1 01:12:25.603: IP-EIGRP(Default-IP-Routing-Table:1): 10.1.0.0/24 - do advertise out Ethernet0
*Mar 1 01:12:25.607: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 metric 4294967295 - 0 4294967295
*Mar 1 01:12:25.647: IP-EIGRP(Default-IP-Routing-Table:1): Processing incoming QUERY packet
*Mar 1 01:12:25.651: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 M 4294967295 - 0 4294967295 SM 4294967295 - 0 4294967295
*Mar 1 01:12:25.679: IP-EIGRP(Default-IP-Routing-Table:1): 10.1.0.0/24 - do advertise out Ethernet0
*Mar 1 01:12:25.683: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 metric 4294967295 - 0 4294967295
*Mar 1 01:12:25.735: IP-EIGRP(Default-IP-Routing-Table:1): Processing incoming REPLY packet
*Mar 1 01:12:25.739: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 M 4294967295 - 0 4294967295 SM 4294967295 - 0 4294967295
*Mar 1 01:12:25.747: IP-EIGRP(Default-IP-Routing-Table:1): 10.1.0.0/24 routing table not updated thru 10.1.3.4
*Mar 1 01:12:25.775: IP-EIGRP(Default-IP-Routing-Table:1): 10.1.0.0/24 - not in IP routing table
最终路由器无法从其他路由器获得替代路径,将改条目从陆游表中删除
*Mar 1 01:12:25.779: IP-EIGRP(Default-IP-Routing-Table:1): Int 10.1.0.0/24 metric 4294967295 - 0 4294967295r3-2514#
r3-2514#un all
至于中间有那么多次E0口上的查询等,可能是因为实验实际环境是路由器的所有E口都接在一台交换机上,而更新查询使用的是多播,每台路由器的查询它都能接到,才会导致这么条目显示.
这个问题,在路由器上不停提示大量提示:*Mar 1 02:14:23.571: IP-EIGRP(Default-IP-Routing-Table:1): Neighbor 10.1.2.4 not on common subnet for Ethernet0的原因是一样的.路由器从交换机上接到了一个HELLO包,而发送HELLO的路由器不是它的真正邻居,所以就报邻居E0不是合法子网.可以看下HELLO调试信息:
r3-2514#debug eigrp packets
*Mar 1 00:31:32.343: IP-EIGRP(Default-IP-Routing-Table:1): Neighbor 10.1.2.4 not on common subnet for Ethernet0
r3-2514#debug eigrp packets
EIGRP Packets debugging is on
(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK, STUB, SIAQUERY, SIAREPLY)
r3-2514#
*Mar 1 00:31:34.287: EIGRP: Received HELLO on Ethernet0 nbr 10.1.1.1
*Mar 1 00:31:34.291: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Mar 1 00:31:34.607: EIGRP: Sending HELLO on Serial1
*Mar 1 00:31:34.611: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
r3-2514#
*Mar 1 00:31:35.731: EIGRP: Received HELLO on Serial1 nbr 10.1.3.4
*Mar 1 00:31:35.731: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:31:36.891: EIGRP: Received HELLO on Ethernet0 nbr 10.1.2.4
*Mar 1 00:31:36.891: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:37.095: EIGRP: Sending HELLO on Loopback0
*Mar 1 00:31:37.099: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:31:37.103: EIGRP: Received HELLO on Loopback0 nbr 3.3.3.3
*Mar 1 00:31:37.107: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:37.111: EIGRP: Packet from ourselves ignored
*Mar 1 00:31:37.711: EIGRP: Sending HELLO on Ethernet0
*Mar 1
00:31:37.715: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
r3-2514#
*Mar 1 00:31:39.019: EIGRP: Sending HELLO on Serial1
*Mar 1 00:31:39.023: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:31:39.095: EIGRP: Received HELLO on Ethernet0 nbr 10.1.1.1
*Mar 1 00:31:39.099: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:31:40.279: EIGRP: Received HELLO on Serial1 nbr 10.1.3.4
*Mar 1 00:31:40.279: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:31:41.619: EIGRP: Received HELLO on Ethernet0 nbr 10.1.2.4
*Mar 1 00:31:41.619: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:41.819: EIGRP: Sending HELLO on Loopback0
*Mar 1 00:31:41.823: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:31:41.839: EIGRP: Received HELLO on Loopback0 nbr 3.3.3.3
*Mar 1 00:31:41.843: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:41.847: EIGRP: Packet from ourselves ignored
*Mar 1 00:31:42.579: EIGRP: Sending HELLO on Ethernet0
*Mar 1 00:31:42.583: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
r3-2514#
*Mar 1 00:31:43.411: EIGRP: Received HELLO on Ethernet0 nbr 10.1.1.1
*Mar 1 00:31:43.415: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Mar 1 00:31:43.487: EIGRP: Sending HELLO on Serial1
*Mar 1 00:31:43.491: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
r3-2514#
*Mar 1 00:31:45.003: EIGRP: Received HELLO on Serial1 nbr 10.1.3.4
*Mar 1 00:31:45.007: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:31:46.587: EIGRP: Received HELLO on Ethernet0 nbr 10.1.2.4
*Mar 1 00:31:46.587: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:46.591: IP-EIGRP(Default-IP-Routing-Table:1): Neighbor 10.1.2.4 not on common subnet for Ethernet0
*Mar 1 00:31:46.819: EIGRP: Sending HELLO on Loopback0
*Mar 1 00:31:46.823: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:31:46.827: EIGRP: Received HELLO on Loopback0 nbr 3.3.3.3
*Mar 1 00:31:46.831: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:46.835: EIGRP: Packet from ourselves ignored
*Mar 1 00:31:47.107: EIGRP: Sending HELLO on Ethernet0
*Mar 1 00:31:47.111: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
r3-2514# iidbQ un/rely 0/0
*Mar 1 00:31:47.883: EIGRP: Received HELLO on Ethernet0 nbr 10.1.1.1
*Mar 1 00:31:47.887: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:31:48.315: EIGRP: Sending HELLO on Serial1
*Mar 1 00:31:48.319: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
r3-2514#
*Mar 1 00:31:49.535: EIGRP: Received HELLO on Serial1 nbr 10.1.3.4
*Mar 1 00:31:49.535: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:31:50.911: EIGRP: Received HELLO on Ethernet0 nbr 10.1.2.4
*Mar 1 00:31:50.911: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:51.091: EIGRP: Sending HELLO on Loopback0
*Mar 1 00:31:51.095: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:31:51.099: EIGRP: Received HELLO on Loopback0 nbr 3.3.3.3
*Mar 1 00:31:51.103: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:51.107: EIGRP: Packet from ourselves ignored
r3-2514#
*Mar 1 00:31:51.915: EIGRP: Sending HELLO on Ethernet0
*Mar 1 00:31:51.919: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:31:52.791: EIGRP: Received HELLO on Ethernet0 nbr 10.1.1.1
*Mar 1 00:31:52.795: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:31:53.195: EIGRP: Sending HELLO on Serial1
*Mar 1 00:31:53.199: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:31:53.983: EIGRP: Received HELLO on Serial1 nbr 10.1.3.4
*Mar 1 00:31:53.983: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:31:55.435: EIGRP: Received HELLO on Ethernet0 nbr 10.1.2.4
*Mar 1 00:31:55.435: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:55.739: EIGRP: Sending HELLO on Loopback0
*Mar 1 00:31:55.743: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:31:55.747: EIGRP: Received HELLO on Loopback0 nbr 3.3.3.3
*Mar 1 00:31:55.751: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:31:55.755: EIGRP: Packet from ourselves ignored
r3-2514#
*Mar 1 00:31:56.811: EIGRP: Sending HELLO on Ethernet0
*Mar 1 00:31:56.815: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:31:57.391: EIGRP: Received HELLO on Ethernet0 nbr 10.1.1.1
*Mar 1 00:31:57.395: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Mar 1 00:31:57.623: EIGRP: Sending HELLO on Serial1
*Mar 1 00:31:57.627: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
r3-2514#
*Mar 1 00:31:58.875: EIGRP: Received HELLO on Serial1 nbr 10.1.3.4
*Mar 1 00:31:58.875: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:32:00.031: EIGRP: Received HELLO on Ethernet0 nbr 10.1.2.4
*Mar 1 00:32:00.031: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:32:00.035: IP-EIGRP(Default-IP-Routing-Table:1): Neighbor 10.1.2.4 not on common subnet for Ethernet0
*Mar 1 00:32:00.079: EIGRP: Sending HELLO on Loopback0
*Mar 1 00:32:00.083: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:32:00.087: EIGRP: Received HELLO on Loopback0 nbr 3.3.3.3
*Mar 1 00:32:00.091: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:32:00.095: EIGRP: Packet from ourselves ignored
r3-2514#
*Mar 1 00:32:01.207: EIGRP: Sending HELLO on Ethernet0
*Mar 1 00:32:01.211: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:32:01.979: EIGRP: Received HELLO on Ethernet0 nbr 10.1.1.1
*Mar 1 00:32:01.983: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:32:02.519: EIGRP: Sending HELLO on Serial1
*Mar 1 00:32:02.523: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
r3-2514#
*Mar 1 00:32:03.623: EIGRP: Received HELLO on Serial1 nbr 10.1.3.4
*Mar 1 00:32:03.623: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#
*Mar 1 00:32:04.659: EIGRP: Sending HELLO on Loopback0
*Mar 1 00:32:04.663: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:32:04.667: EIGRP: Received HELLO on Loopback0 nbr 3.3.3.3
*Mar 1 00:32:04.671: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:32:04.675: EIGRP: Packet from ourselves ignored
*Mar 1 00:32:04.879: EIGRP: Received HELLO on Ethernet0 nbr 10.1.2.4
*Mar 1 00:32:04.879: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
r3-2514#
*Mar 1 00:32:06.035: EIGRP: Sending HELLO on Ethernet0
*Mar 1 00:32:06.039: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un
/rely 0/0
*Mar 1 00:32:06.923: EIGRP: Received HELLO on Ethernet0 nbr 10.1.1.1
*Mar 1 00:32:06.927: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Mar 1 00:32:06.931: EIGRP: Sending HELLO on Serial1
*Mar 1 00:32:06.935: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
r3-2514#
*Mar 1 00:32:07.943: EIGRP: Received HELLO on Serial1 nbr 10.1.3.4
*Mar 1 00:32:07.943: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
r3-2514#uanl
*Mar 1 00:32:09.147: EIGRP: Sending HELLO on Loopback0
*Mar 1 00:32:09.151: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:32:09.155: EIGRP: Received HELLO on Loopback0 nbr 3.3.3.3
*Mar 1 00:32:09.159: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
*Mar 1 00:32:09.163: EIGRP: Packet from ourselves ignored
*Mar 1 00:32:09.399: EIGRP: Received HELLO on Ethernet0 nbr 10.1.2.4
*Mar 1 00:32:09.403: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0
r3-2514#un
*Mar 1 00:32:10.379: EIGRP: Sending HELLO on Ethernet0
*Mar 1 00:32:10.383: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
*Mar 1 00:32:11.223: EIGRP: Received HELLO on Ethernet0 nbr 10.1.1.1
*Mar 1 00:32:11.227: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
*Mar 1 00:32:11.379: EIGRP: Sending HELLO on Serial1
*Mar 1 00:32:11.383: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
r3-2514#un all
All possible debugging has been turned off
r3-2514#
*Mar 1 00:32:12.759: EIGRP: Received HELLO on Serial1 nbr 10.1.3.4
*Mar 1 00:32:12.763: AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
路由器一旦接到10.1.2.4发来的HELLO就返回一个那样的提示信息出来,看上面的蓝色部分.
另外从这个上面也可以看出HELLO消息在以太网链路上是5秒一次,在这个全互连帧中继线路上也是5秒一次.
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