SR6608与友商AR6280作为本部的出口路由器。AR6280作为主设备承载业务流,SR6608作为备设备承载视频流。全网采用OSPF,调整LB到SR6608、SR6608到二级站点路由器的开销,使路由表中所有路由条目均由主设备通过主链路路由。
通过在SR6608及MSR5660做策略路由,使视频流优先走备链路,仅当备链路down掉之后切到主链路。
现存在问题:备链路down了之后,视频中断时间较长,约为7-10s,会导致视频中断。但是备链路恢复,视频从主链路切到备链路,视频不中断。客户希望优化配置,缩短视频中断时间。
主要配置:
SR6608
acl advanced 3104 | |
description 4_video | |
rule permit ip source 188.232.0.0 0.0.255.255 destination 188.233.64.0 0.0.15.255 | |
quit | |
# | |
nqa entry admin 4_video | |
type icmp-echo | |
destination ip 188.232.254.114 | |
next-hop ip 188.232.254.114 | |
frequency 100 | |
reaction 1 checked-element probe-fail threshold-type consecutive 5 action-type trigger-only | |
quit | |
# | |
track 4 nqa entry admin 4_video reaction 1 | |
quit | |
# | |
policy-based-route video permit node 4 | |
if-match acl 3104 | |
apply next-hop 188.232.254.114 track 4 | |
quit | |
#
|
acl advanced 3104 |
description 4_video |
rule permit ip source 188.233.64.0 0.0.15.255 destination 188.232.0.0 0.0.255.255 |
quit |
# |
nqa entry admin 14_video |
type icmp-echo |
destination ip 188.232.254.113 |
next-hop ip 188.232.254.113 |
frequency 100 |
reaction 1 checked-element probe-fail threshold-type consecutive 5 action-type trigger-only |
quit |
# |
nqa schedule admin 4_video start-time now lifetime forever |
track 1 nqa entry admin 4_video reaction 1 |
quit |
# |
policy-based-route 4_video permit node 1 |
if-match acl 3104 |
apply next-hop 188.232.254.141 track 1 |
quit |
# |
# |
interface GigabitEthernet2/0/1 |
ip policy-based-route 4_video |
# |
interface GigabitEthernet2/0/2 |
ip policy-based-route 4_video |
# |
interface GigabitEthernet2/0/3 |
ip policy-based-route 4_video |
# |
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100ms的频率,5次的失败探测次数。不应该是秒级切换?