Cisco WAN :: 7600 IP SLA - Send More ICMP Within Each Interval
Oct 29, 2011
I have a cisco 7600. It will send an icmp request every second. If the icmp response is not received, 3 consecutive icmp requests will be sent. SLA reachability down will be reported after all 4 icmp responses are not received. The following diagram illustrates my goal.
Sender --------------------------------------- 0 second -> 0 sec (1st icmp Request is sent out)-> 50ms (no response, send 2nd icmp after timeout)-> 50ms (no response, send 3rd icmp after timeout) -> 50ms (no response, send 4th icmp after timeout) 50ms Report SLA reachability down
--------------------------------------- 1 second
--------------------------------------- 2 second
Question: will the following configuration achieve my goal?
ip sla 100icmp-echo 10.32.24.1 source-ip 10.32.24.2timeout 50frequency 1
ip sla monitor reaction-configuration 100 react timeout threshold-type consecutive 3 action-type triggerOnly
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May 1, 2012
after a certain period of time (ranging from 2 minutes to several hours) the unit keeps dropping the WAN connection, making the unit unaccessible from the WAN side. The strange thing is, that when the connection is dropped, the unit is perfectly accessible from the LAN side, the WAN LED is still on, status info shows the WAN link up, and packet trace shows broadcasted traffic on the WAN interface, so only the directed communication to and from the ISPs gateway (configured to fix IP) seems to be blocked for some reason. When this happens, then plugging the WAN cable to the Optional WAN port enables traffic again, but it is also dropped after some time, and then only power cycling the unit restores WAN connectivity.
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Jan 9, 2012
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Sep 18, 2011
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Jan 21, 2013
Region : Others
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Hardware Version : V4
Firmware Version :
ISP :
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Jan 26, 2012
I cannot seem to ping between devices on two networks hanging off a 5520 unless I use the same-security interface command. I have the relevant ACL's set up between the interfaces, but it just doesnt work unless I have that command in - if I use that command, it bypasses the ACL.
Config
interface GigabitEthernet0/0.224
description NMS
vlan 224
nameif NMS
security-level 100
ip address 10.11.120.225 255.255.255.240[code].....
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May 29, 2011
I want to know how to use ICMP protocol in sending a packet in a network ?
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Jan 31, 2012
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Feb 27, 2011
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Sep 5, 2012
I am trying to set up the router (881) using Cisco Configuration Professional, to allow ping reply's..I can not for the life of me figure it out.
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Jan 22, 2012
Have a very peculiar issue with IP SLA. Firstly, the architecture.
1) There are two sites - A & B. Both have their own internet connection.
2) Sites A & B are connected via MPLS.
3) Both sites have the below topology.
3750 CORE --> FIREWALL -->ROUTER ---> INTERNET
4) 3750 has a Default route pointing to firewall .
5) MPLS router is connected to 3750. A default information is originated via BGP to MPLS at each location. So that default route is learnt as a backup path from any location if it has to lose its local internet.
6) IP SLA has been configured at each location to track the default route using icmp-echo to hit a public IP (i.e 4.2.2.2 as an example).
Issue?ICMP probes from Site-A via its local internet fails abruptly. I can reach the public IP mentioned above from my firewall pretty fine, but not from my 3750. Whenever i remove the tracking from the static default route & push in the plain default route without tracking, it works fine. Again, if i add the tracking back, it will work fine for an hour or so & then fails back again. To my bad, Site-B had recently gone offline due to some natural calamity. So, there is no other path for internet.
My config looks pretty simple
track 10 ip sla 1 reachability
!
ip sla 1
icmp-echo 4.2.2.2 source-ip 10.1.254.1
frequency 180
ip sla schedule 1 life forever start-time now
ip sla enable reaction-alerts
!
ip route 0.0.0.0 0.0.0.0 10.1.254.1 track 10
I am running IOS version 12.2(53)SE2 (IPservices images).
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Feb 5, 2012
The below output has taken from Cisco 3750 switch which the CPU utilization is more than 80%. What is the meaning of this below information.
switch#debug platform CPU-queues icmp-q
debug platform CPU-queue icmp-q debugging is on
Feb 6 18:44:09.860: ICMP-Q:Dropped redirect disabled on L3 IF: Local Port Fwding L3If:Vlan41 L2If:GigabitEthernet1/0/8 DI:0xB4, LT:7, Vlan:41 SrcGPN:8, SrcGID:8, ACLLogIdx:0x0, MacDA:0019.aade.0d58, MacSA: b8ac.6f2a.2734 IP_SA:10.43.41.87 IP_DA:172.20.31.25 IP_Proto:6
TPFFD:ED580008_00290029_00B0009F-000000B4_90BD001F_6C6E1FC0
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Sep 19, 2011
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Jan 31, 2013
i have a query ,we are planning to upgrade the Sup Engine from WS-SUP720-3B 2 ports Supervisor Engine 720 to
RSP720-3CXL-GE=
Cisco 7600 Route Switch Processor 720Gbps fabric,PFC3CXL, GE
Can we use the same old IOS from Sup720 to the New RSP720 without purchasing it ?
Show Version-- Cisco Router 7609
Cisco IOS Software, c7600s72033_rp Software (c7600s72033_rp-ADVIPSERVICESK9-M), Version 12.2(33)SRB3, RELEASE SOFTWARE (fc1)ROM: System Bootstrap, Version 12.2(17r)S4, RELEASE SOFTWARE (fc1)
System returned to ROM by power cycle at 08:36:39 PDT Fri Mar 30 2007 (SP by power on)
System restarted at 10:04:20 GMT Fri Nov 25 2011
System image file is "bootdisk:c7600s72033-advipservicesk9-mz.122-33.SRB3.bin"
Last reload type: Normal Reload
[code]....
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what is use of haiving SPA and SIP in router hardware ? what if we dont have them in router ?
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Jun 6, 2012
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Feb 28, 2011
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May 23, 2012
I'm having issues with NAT dropping ICMP on default NAT. Do I need to create another NAT for ICMP?
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firewall01# packet-tracer input inside icmp 172.23.1.74 0 10 8.8.8.8 detailed
Phase: 1
Type: ROUTE-LOOKUP
Subtype: input
Result: ALLOW
Config:
[code]....
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I've tried varying ACL's and applied to Fa0, none of which work [code]
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I want to allow ICMP traffic on ASA 5510 from LAN interface to DMZ. I've permit any traffic and added ICMP to the inspestion list also but still there is problem. Belos is the configuration. The image is asa822-k8.bin
:
ASA Version 8.2(2)
!
hostname fw-01
names
!
interface Ethernet0/0
[code]....
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Mar 6, 2011
I need to know if upgrading Cisco IOS on 7600 series router is possible. From 12.2(18)SXF --> 12.2(33)SRC, i need this because SRC supports Lawfull Intercept.
specification of router is 7606
slot 1 - WS-X6708-10GE
slot 1/0 - WS-F6700-DFC3C
slot 4 - WS-X6408A-GBIC
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Dec 5, 2012
The 7600 platform support x.25 and XOT features. In ios versión S764AEK9-15103SCisco 7600-RSP720 IOS ADVANCED ENTERPRISE SERVICES SSH The feature navigator display that support this features, but i'dont see these on the other newer ios version. If posible use 7600 for x.25 / xot or maybe will used de 3900 platform?
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Jan 19, 2012
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May 16, 2012
Today i want to ask is cisco 7600 support ip next-hop recusrive x.x.x.x (PBR feature).
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Nov 19, 2011
Why below simple PBR is not implemented in H/W knowing the Copp is not configured
NPE-1#sh ver | i image
System image file is "bootdisk:c7600rsp72043-advipservices-mz.122-33.SRE0a"
NPE-1#sh run int GigabitEthernet1/1
interface GigabitEthernet1/1
ip address 11.0.0.1 255.255.255.0
ip pim sparse-mode
[code]...
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May 11, 2011
I am trying to establish a BGP session between a Cisco 7600 and Juniper MX960, but this always stucks in OpenConfirm state.
access-4#show ip bgp v v VRF1 neighbors 166.63.168.197BGP neighbor is 166.63.168.197, vrf VRF1, remote AS 5555, local AS 65533, external link BGP version 4, remote router ID 195.2.1.21 BGP state = OpenConfirm Last read 00:02:27, last write 00:02:27, hold time is 180, keepalive interval is 60 seconds Message statistics: InQ depth is 0 OutQ depth is 0 Sent Rcvd Opens: 4 4 Notifications: 2 1 Updates: 0 0 Keepalives: 4
May 12 13:58:07.531 bst: TCP src=54912, dst=179, seq=1766275951, ack=1681278050, win=17520 ACK PSHMay 12 13:58:07.535 bst: IP: tableid=2, s=166.63.168.198 (local), d=166.63.168.197 (Vlan20), routed via FIBMay 12 13:58:53.883 bst: IP: tableid=2, s=166.63.168.198 (local), d=166.63.168.197 (Vlan20), routed via FIBMay 12 13:58:59.359 bst: IP: s=166.63.168.197 (Vlan20), d=166.63.168.198, len 61, rcvd 2May 12 13:58:59.359 bst: TCP src=54912, dst=179, seq=1766276010, ack=1681278050, win=17520 ACK PSH FINMay 12 13:58:59.359 bst: IP: tableid=2, s=166.63.168.198 (local), d=166.63.168.197 (Vlan20), routed via FIBMay 12 13:58:59.359 bst: %BGP-3-NOTIFICATION: received from neighbor 166.63.168.197 4/0 (hold time expired) 0 bytes
ICMP works fine. It is same on JUniper end. Sending keepalives but cannot receive
###interface configinterface Vlan20 ip vrf forwarding VRF1 ip address 166.63.168.198 255.255.255.252 no ip redirects no ip proxy-arp load-interval 30end
###bgp config
neighbor 166.63.168.197 remote-as 5555 neighbor 166.63.168.197 local-as 65533 neighbor 166.63.168.197 ebgp-multihop 5 neighbor 166.63.168.197 update-source Vlan20 neighbor 166.63.168.197 activate neighbor 166.63.168.197 soft-reconfiguration inbound
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Nov 5, 2012
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[URL]
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Jan 19, 2012
what is the use SPA and SIP...in router hardware ? What if we do not have them ?
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Oct 16, 2012
I have a strange QoS problem with one Cisco7600 (sup7203BXL, IOS 12.2(33)SRE6).
This is layer 2 traffic,and all ports are L2 dot1q trunks:
1) Packet comes with DSCP 46 on Gigabit port (WS6728-SFP) with "mls qos trust dscp" configured. It goes out the port of the same card/slot with DSCP 0.
2) packet comes with DSCP 46 on different Gigabit port on the same card/slot with "mls qos trust dscp" and also "mls qos vlan-based" configured. It qoes out out the port with DSCP 46.
Why the switch behave differently if "mls qos vlan-based" is configured on port (or to say it works correct since it doesn't override DSCP)?
I have global command "mls qos rewrite ip dscp" since this 7600 is also MPLS PE router and I found in documentation that "mls qos rewite ip dscp" is mandatory for QoS on MPLS (EXP bits). So I can't turn off "rewrite ip dscp". Again the problem that I presents is L2 problem not MPLS (MPLS is used for different traffic).
Also mls qos mappings are ok COS to DSCp are 5 to 46 and vice versa.
Furthermore, as far as I know if I have configured "mls qos trust dscp" on Gigabit ethernet port, switch (7600) should work in this order:
- make internal DSCP from packet DSCP
- since I don't have configured DSCP mutation DSCP should stay the same (46)
- using map DSCP - COS ( 46 -5 ) switch will choose queue on outgoing interface in regards to mapped COS
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Dec 21, 2010
I would like to passthrough ICMP 8 (ping) requests through the DIR-655 to my server. I found where to allow the router to respond to ICMP 8 requests, however, I do not want the router to responder, rather the server itself. Is there a way to pass these requests through to the server?
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