SR6602-X1+ISP运营商带宽经过路由器后带宽不足

ISP给的带宽是250M、经过SR6602-X1路由器后不足100M、

1、单独用电脑连接ISP运营商线路测试有250M（不经过任何设备）

2、检查过端口状态都是正常的、

3、按照网上修改过TPC MSS 和 MTU值后还是一样、

4、没有任何限速设备、安全设备等

5、我内网测试速度在核心交换机测试过，直接连接在路由器上也测试过、效果都是一样。

6、没任何特殊配置、就一个NAT、

7、自己收集诊断信息用标杆也检查过、全部都是通过。

这个是端口状态信息

[SR6602-X1]dis int g 0/0/0 

GigabitEthernet0/0/0 current state: UP 

Line protocol current state: UP Description: TO-DianXin 

The Maximum Transmit Unit is 1500 

Internet Address is 211.X.X.X/30 Primary 

IP Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 70f9-6dac-7ffc 

IPv6 Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 70f9-6dac-7ffc 

Media type is twisted pair, loopback not set, promiscuous mode not set 1000M, Full, link type is autonegotiation 

Output flow-control is disabled, input flow-control is disabled 

Output queue : (Urgent queuing : Size/Length/Discards) 0/100/0 

Output queue : (Protocol queuing : Size/Length/Discards) 0/500/0 

Output queue : (FIFO queuing : Size/Length/Discards) 0/1024/0 

Last clearing of counters: Never 

Last 300 seconds input rate 4774058.00 bytes/sec, 38192464 bits/sec, 4286.59 packets/sec 

Last 300 seconds output rate 466956.87 bytes/sec, 3735648 bits/sec, 2861.83 packets/sec 

Input: 128370849 packets, 137932504441 bytes, 0 no buffers 8527 broadcasts, 24594 multicasts, 0 pauses 863 errors, 0 runts, 0 giants 863 crc, 0 align errors, 0 overruns 0 dribbles, 0 drops 

 Output:86077545 packets, 19074831866 bytes 28 broadcasts, 1656 multicasts, 0 pauses 0 errors, 0 underruns, 0 collisions 0 deferred, 0 lost carriers