关于eigrp holding time expired
关于eigrp holding time expired关于eigrp holding time expired
，拓扑如下
说明：1.cov1和cov2只是作为二层交换机使用。 2.网络运行的是EIGRP协议，R1中的fa0/7和fa0/9作为三层借口，分别和ISP1和ISP2相连。
3.ip地址分配：isp1s0/2 3.3.3.1（此实验中未用到） Fa1/01.1.1.1 Isp2s0/3 4.4.4.1（此实验中未用到） Fa1/0 2.2.2.1 R1 fa0/7 1.1.1.2 Fa0/8 2.2.2.2 以上实验的掩码均为255.255.255.0 问题：1.shudown
fa0/9之后，r1 ping 1.1.1.1 可通（正常）
2.当shudown fa0/7之后（fa0/9处于uo），r1 ping 2.2.2.1 却不通，r1上如下的提示错误提示： #ping 2.2.2.1 Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2.2.2.1,timeout is 2 seconds:.....Success rate is 0 percent (0/5)R1#*Mar
1 01:10:29.899:%DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 2.2.2.1(FastEthernet0/9) is down: holding time expired
Isp2路由上有如下的提示*Mar
1 01:15:49.267:%DUAL-5-NBRCHANGE: IP-EIGRP(0) 10: Neighbor 2.2.2.2(FastEthernet1/0) is down: retry limit exceeded 此时的fa0/9端口和fa1/0端口却显示正常，如下
R1#ping 2.2.2.1 Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2.2.2.1,timeout is 2 seconds:.....Success rate is 0 percent (0/5)R1#sh int fa0/9FastEthernet0/9 is up, line protocol is up
Hardware is Fast Ethernet, address is cc00.17b8.f009 (bia cc00.17b8.f009)
Internet address is 2.2.2.2/24
MTU1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
ARPtype: ARPA, ARP Timeout 04:00:00
Last input 00:02:05, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5minute input rate 0 bits/sec, 0 packets/sec
5minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 403 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 11 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out ISP2#sh int fa1/0FastEthernet1/0 is up,line protocol is up
Hardware is AmdFE, address is cc02.17b8.0010(bia cc02.17b8.0010)
Internet address is 2.2.2.1/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, outputhang never
Last clearing of "show interface"counters never
Input queue: 0/75/0/0(size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0packets/sec
5250 packets input, 357993 bytes
Received 4841 broadcasts, 0 runts, 0giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun,0 ignored
0 watchdog
0 input packets with dribble conditiondetected
3250 packets output, 269717 bytes, 0underruns
0 output errors, 0 collisions, 1 interfaceresets 当我把r1上的fa0/9和isp1/0的端口，shut和弄no sh之后，r1可正常ping通2.2.2.1 请大家帮忙解决一下！谢谢 ISP1.和isp2、R1的协议信息如下 ISP1#ship proRouting Protocol is "eigrp 10"
Outgoing ** filter list for all interfaces is not set
Incoming ** filter list for all interfaces is not set
Default networks flagged in outgoing **s
Default networks accepted from incoming **s
EIGRP metric weight K1=1, K2=0, K3=1,K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 10
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
1.1.1.0/24
3.3.3.0/24
Routing Information Sources:
Gateway
Distance
Last **
3.3.3.2
90
01:16:43
1.1.1.2
90
00:07:46
Distance: internal 90 external 170 ISP2#ship pro Routing Protocol is "eigrp 10"
Outgoing ** filter list for all interfaces is not set
Incoming ** filter list for all interfaces is not set
Default networks flagged in outgoing **s
Default networks accepted from incoming **s
EIGRP metric weight K1=1, K2=0, K3=1,K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 10
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
2.2.2.0/24
4.4.4.0/24
Routing Information Sources:
Gateway
Distance
Last **
2.2.2.2
90
00:06:19
4.4.4.2
90
01:17:20
Distance: internal 90 external 170 R1#ship proRouting Protocol is "eigrp 10"
Outgoing ** filter list for all interfaces is not set
Incoming ** filter list for all interfaces is not set
Default networks flagged in outgoing **s
Default networks accepted from incoming **s
EIGRP metric weight K1=1, K2=0, K3=1,K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 10
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
1.1.1.0/24
2.2.2.0/24
Routing Information Sources:
Gateway
Distance
Last **
1.1.1.1
90
00:45:53
2.2.2.1
90
01:05:59
这个和EIGRP本身没什么太多的关系，只是你中间的switching的问题，应该是你机器模拟交换机的问题，建议中间直接挂一个2层交换机即可，关于eigrp的hold time exp的问题就是延迟太大导致的在hold 时间没有接收到对方的hello包.... 了解下，EIGRP这个问题，可以参考《TCP/IP卷一》的EIGRP部分，看看，里面有详细的说明和举例。 如果PC的CPU不够强大的话，那么，EIGRP会不断UP/DOWN，我的电脑就是如此，CPUT5870 非常感谢大家的解答，也非常感谢晓强老师的指引，对Eigrp有了进一步的认识，先去看看《TCP/IP卷一》这本书 有问题上论坛，都是好孩子。 有问题多讨论，多交流~
通过网络和查阅书籍会学习更多~ -woniu6--woniu6--woniu6- 很多问题对大家来说很简单,对我来说却有点复杂,希望大家能多多指教了.
本帖最后由 tieqilin 于 2011-2-9 21:10 编辑
如果PC的CPU不够强大的话，那么，EIGRP会不断UP/DOWN水星家纺
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