我知道ICMP "echo request"发送到路由器的消息在进程切换中处理，以防路由器运行 IOS。但是，运行 IOS-XR 的 Cisco ASR9K 路由器呢？ICMP "echo request"消息的处理与运行 IOS 的软件路由器完全一样吗？
在运行 Cisco IOS-XR 的路由器上处理 ICMP“回声请求”
网络工程
国际会议
cisco-ios-xr
2021-07-15 03:54:25
1个回答
在运行 IOS-XR ICMP 数据包的 ASR9k 上，发往路由器的数据包由 LTPS（本地数据包传输系统）处理。我相信在正常情况下，此类数据包的整个处理都是在入口线卡 CPU 上完成的。
一旦入口 LC 上的 NP 检测到数据包是给我们的，它就会将其移交给 LTPS。LTPS 将执行监管，然后将符合的数据包传递给 LC CPU 或 RP。
可以使用以下命令检查特定 LC 的不同类型流量的计数器：
RP/0/RSP0/CPU0:ASR9006#show lpts pifib hardware police location 0/1/CPU0
Tue May 19 11:03:19.188 UTC
-------------------------------------------------------------
Node 0/1/CPU0:
-------------------------------------------------------------
Burst = 100ms for all flow types
-------------------------------------------------------------
FlowType Policer Type Cur. Rate Def. Rate Accepted Dropped TOS Value
---------------------- ------- ------- ---------- ---------- -------------------- -------------------- ----------
unconfigured-default 100 Static 2500 2500 0 0 01234567
L2TPv2-fragment 185 Static 10000 10000 0 0 01234567
Fragment 101 Static 2500 2500 0 0 01234567
OSPF-mc-known 102 Static 2000 2000 356486 0 01234567
OSPF-mc-default 103 Static 1500 1500 0 0 01234567
OSPF-uc-known 104 Static 2000 2000 81 0 01234567
OSPF-uc-default 105 Static 1000 1000 0 0 01234567
ISIS-known 143 Static 2000 2000 0 0 01234567
ISIS-default 144 Static 1500 1500 0 0 01234567
BFD-known 150 Static 9600 9600 0 0 01234567
BFD-default 160 Static 45340 9600 0 0 01234567
BFD-MP-known 178 Static 11520 11520 0 0 01234567
BFD-MP-0 179 Static 128 128 0 0 01234567
BFD-BLB-known 183 Static 11520 11520 0 0 01234567
BFD-BLB-0 184 Static 128 128 0 0 01234567
BFD-SP-0 182 Static 512 512 0 0 01234567
BGP-known 106 Static 2500 2500 1424782 0 01234567
BGP-cfg-peer 107 Static 2000 2000 8 0 01234567
BGP-default 108 Static 1500 1500 87 0 01234567
PIM-mcast-default 109 Static 2000 2000 0 0 01234567
PIM-mcast-known 176 Static 2000 2000 0 0 01234567
PIM-ucast 110 Static 1500 1500 0 0 01234567
IGMP 111 Static 3000 3000 0 0 01234567
ICMP-local 112 Static 1500 1500 17 0 01234567
ICMP-app 152 Static 1500 1500 0 0 01234567
ICMP-control 140 Static 1000 1000 0 0 01234567
ICMP-default 153 Static 1500 1500 2 0 01234567
ICMP-app-default 152 Static 1500 1500 0 0 01234567
LDP-TCP-known 113 Static 2500 2500 56736 0 01234567
LDP-TCP-cfg-peer 114 Static 2000 2000 0 0 01234567
LDP-TCP-default 115 Static 1500 1500 0 0 01234567
LDP-UDP 116 Static 2000 2000 401486 0 01234567
All-routers 117 Static 1000 1000 0 0 01234567
LMP-TCP-known 168 Static 2500 2500 0 0 01234567
LMP-TCP-cfg-peer 169 Static 2000 2000 0 0 01234567
LMP-TCP-default 170 Static 1500 1500 0 0 01234567
LMP-UDP 171 Static 2000 2000 0 0 01234567
RSVP-UDP 118 Static 2000 2000 0 0 01234567
RSVP-default 154 Static 500 500 0 0 01234567
RSVP-known 177 Static 7000 7000 0 0 01234567
IKE 119 Static 100 100 0 0 01234567
IPSEC-known 120 Static 400 400 0 0 01234567
IPSEC-default 121 Static 100 100 0 0 01234567
MSDP-known 122 Static 300 300 0 0 01234567
MSDP-cfg-peer 123 Static 200 200 0 0 01234567
MSDP-default 124 Static 100 100 0 0 01234567
SNMP 125 Static 300 300 221047 0 01234567
SSH-known 127 Static 300 300 597 0 01234567
SSH-default 128 Static 200 200 218 0 01234567
HTTP-known 129 Static 400 400 0 0 01234567
HTTP-default 130 Static 200 200 0 0 01234567
SHTTP-known 161 Static 400 400 0 0 01234567
IFIB_FT_SHTTP_DEFAULT 162 Static 200 200 0 0 01234567
TELNET-known 131 Static 200 200 0 0 01234567
TELNET-default 132 Static 200 200 0 0 01234567
CSS-known 133 Static 200 200 0 0 01234567
CSS-default 134 Static 200 200 0 0 01234567
RSH-known 135 Static 200 200 0 0 01234567
RSH-default 136 Static 200 200 0 0 01234567
UDP-known 137 Static 2500 2500 0 0 01234567
UDP-listen 138 Static 2500 2500 0 0 01234567
UDP-cfg-peer 155 Static 2500 2500 0 0 01234567
UDP-default 163 Static 3500 3500 2396 0 01234567
TCP-known 156 Static 2500 2500 0 0 01234567
TCP-listen 157 Static 2500 2500 0 0 01234567
TCP-cfg-peer 158 Static 2000 2000 0 0 01234567
TCP-default 164 Static 2000 2000 72 0 01234567
Mcast-known 159 Static 2500 2500 0 0 01234567
Mcast-default 165 Static 2000 2000 0 0 01234567
Raw-listen 166 Static 2500 2500 0 0 01234567
Raw-default 167 Static 2500 2500 0 0 01234567
Ip-Sla 139 Static 1000 1000 0 0 01234567
EIGRP 145 Static 1500 1500 0 0 01234567
RIP 146 Static 1500 1500 0 0 01234567
L2TPv3 141 Static 400 400 0 0 01234567
PCEP 142 Static 200 200 0 0 01234567
GRE 147 Static 10000 10000 0 0 01234567
VRRP 148 Static 1000 1000 0 0 01234567
HSRP 149 Static 400 400 0 0 01234567
MPLS-oam 151 Static 250 250 0 0 01234567
L2TPv2-default 172 Static 2000 2000 0 0 01234567
L2TPv2-known 181 Static 2500 2500 0 0 01234567
DNS 173 Static 2000 2000 0 0 01234567
RADIUS 174 Static 2000 2000 0 0 01234567
TACACS 175 Static 2000 2000 0 0 01234567
NTP-default 126 Static 200 200 0 0 01234567
NTP-known 180 Static 200 200 0 0 01234567
AMT 186 Static 4000 4000 0 0 01234567
MIPv6 188 Static 0 0 0 0 01234567
SDAC-TCP 187 Static 5000 5000 0 0 01234567
ONEPK 189 Static 0 0 0 0 01234567