EIGRP Query Storm - Printable Version +- How2pass.com Forums (https://www.how2pass.com/forum) +-- Forum: CCNP (https://www.how2pass.com/forum/forum-6.html) +--- Forum: CCNP ENARSI 300-410 Forum (https://www.how2pass.com/forum/forum-15.html) +--- Thread: EIGRP Query Storm (/thread-219.html)

EIGRP Query Storm - viets - 09-10-2009 Hello, I have the following Problem with the topology below. If the connection between as1_r1 and as1_r6 or as1_r3 and as1_r7 flaps one time, all routers gets a high CPU load and the route 10.1.16.0/21 (the summary is configured on as1_r6 and as1_r7 on the serials) is in eigrp active state all time, because every router queries for this route.... One solution is to shut down one serial on as1_r{1,2,3} or to configure as1_r6 or as1_r7 as a stub router, but I think there should be another solution. If needed, I could post the configurations... Thanks in Advance Viets [code]as1_r1#sh ip eigrp topology  active IP-EIGRP Topology Table for AS(1)/ID(91.189.94.4) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,        r - reply Status, s - sia Status A 10.1.16.0/21, 1 successors, FD is Inaccessible, QR     3 replies, active 00:00:00, query-origin: Successor Origin         via 10.1.1.11 (Infinity/Infinity), Serial1/0, serno 59115         via 10.1.16.1 (Infinity/Infinity), r, Serial1/1, serno 59125         via 10.1.1.2 (Infinity/Infinity), r, R, FastEthernet0/0, serno 59122, anchored         via 10.1.1.10 (Infinity/Infinity), Serial1/0, serno 59124       Remaining replies:          via 10.1.1.3, r, FastEthernet0/0 [/code] [code] as1_r1#sh ip int brief Interface                  IP-Address      OK? Method Status                Protocol FastEthernet0/0            10.1.1.1        YES NVRAM  up                    up        Serial1/0                  10.1.1.9        YES NVRAM  up                    up      Serial1/1                  10.1.0.1        YES TFTP   up                    up      Loopback0                  10.1.0.1        YES NVRAM  up                    up      Loopback1                  91.189.94.4     YES NVRAM  up                    up      as1_r2#sh ip int brief Interface                  IP-Address      OK? Method Status                Protocol FastEthernet0/0            10.1.1.2        YES NVRAM  up                    up      Serial1/0                  10.1.1.10       YES NVRAM  up                    up          Loopback0                  10.1.0.2        YES NVRAM  up                    up    as1_r3#sh ip int brief Interface                  IP-Address      OK? Method Status                Protocol FastEthernet0/0            10.1.1.3        YES NVRAM  up                    up      Serial1/0                  10.1.1.11       YES NVRAM  up                    up        Serial1/2                  10.1.0.3        YES TFTP   up                    up      Loopback0                  10.1.0.3        YES NVRAM  up                    up      Loopback1                  10.1.8.1        YES NVRAM  up                    up      as1_r6#sh ip int brief Interface                  IP-Address      OK? Method Status                Protocol FastEthernet0/0            10.1.17.1       YES NVRAM  up                    up        Serial1/0                  10.1.16.1       YES TFTP   up                    up      Loopback0                  10.1.16.1       YES NVRAM  up                    up  as1_r7#sh ip int brief Interface                  IP-Address      OK? Method Status                Protocol FastEthernet0/0            10.1.17.2       YES NVRAM  up                    up        Serial1/0                  10.1.16.2       YES TFTP   up                    up      Loopback0                  10.1.16.2       YES NVRAM  up                    up [/code] Re: EIGRP Query Storm - viets - 09-10-2009 Hello, I've found the problem, the summaries were configured with the administrative distance of 220, this is higher than 90 from eigrp so this was the bug... this thread can be closed/deleted... greetings Viets