为了检查EIGRP NSF功能，请发出show ip protocols命令。这是输出示例: ：
show ip protocols
; Routing Protocol is "eigrp
101"
;
; Outgoing update filter list for all
interfaces is not set
;
; Incoming update filter list for all
interfaces is not set
;
; Default networks flagged in outgoing
updates
;
; Default networks accepted from
incoming updates
;
; EIGRP metric weight K1=1, K2=0, K3=1,
K4=0, K5=0
;
; EIGRP maximum hopcount 100
;
; EIGRP maximum metric variance 1
;
; Redistributing: eigrp 101
;
EIGRP NSF-aware
route hold timer is 240s
;
; Automatic network summarization is in
effect
;
; Maximum path: 4
;
;;Routing for Networks:
;
; Routing Information Sources:
;
; Gateway;;;;;;;;
Distance;;;;;
Last Update
;
; Distance: internal 90 external 170
此输出显示路由器是NSF意识的，并且路由保持计时器设置为240秒，是默认值。
