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Results tagged with cisco
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user 17285
The major provider of networking equipment. This is a generic tag to be used when no more specific tags are available. See the list of tags in Help Center Tag page.
1
vote
1
answer
1k
views
Cisco ASA 5500 disable connection tracking
I have cisco ASA 5500 firewall and curious can i disable connection tracking for specific rules or protocol. …
- 4,389
2
votes
1
answer
2k
views
vlan traffic flooding on all interface
Update:
After googling i found people saying reduce ARP timeout and increase MAC timeout, (Arp < Mac)
Cisco default Arp timeout is 4 hour, and Mac timeout is 300s (5min). …
- 4,389
2
votes
Accepted
Cisco IOS SHA-1 hash doesn't match
Solution:
Talked to Cisco TAC support and they found rommon (Firmware Version) has bug, and they upgrade following two component
R1#upgrade rom-monitor filename bootflash:asr1000-rommon-155-3r.S1.pkg R0 …
- 4,389
1
vote
Accepted
Cisco netflow with nfsen/nfdump
Solution
Add following in flow record, it won't work with ipfix but it does work with Netflow-v9
collect timestamp sys-uptime first
collect timestamp sys-uptime last
Exporter enable Netflow-v9
- 4,389
1
vote
Accepted
UDLD disabled interface
Solution:
We had two switches.
[SW1]------10G------[SW2]
We upgraded SW1 with latest version and after upgrade UDLD failed between two switch.
We disabled UDLD on that port and everything was working …
- 4,389
3
votes
2
answers
412
views
rfc1918 address in WAN point-to-point link
What will be the issue if we use rfc1918 private IP address range /31 or /30 in point-to-point link?
[ISP]--------------[Router1]------rfc1918--------[L3 Switch]-------[LAN]
I heard PMTU can be issu …
- 4,389
1
vote
Accepted
Trex not receiving any packets
I forgot to mention that my DUT server/application was running on Openstack cloud.
Solution:
Disable port_security_enabled option on neutron port because it had lots of anti-spoofing rules blocking mu …
- 4,389
2
votes
1
answer
14k
views
ip ssh source-interface vlan - allow ssh from specific vlan not working
ip ssh source-interface vlan 1
EDIT
I have following cisco config. but its not working
line con 0
stopbits 1
line aux 0
line vty 5 15
access-class ALLOW-SSH in …
- 4,389
1
vote
1
answer
1k
views
HSRP traffic flow asymmetric
I have asked following question related HSRP setup and here is the diagram and detail:
HSRP issue both device active stats
Question: I have cached on our cacti monitoring, traffic is flowing asymme …
- 4,389
1
vote
1
answer
2k
views
Cisco ASR1001 licence throughput measurement
Cisco ASR1001 comes with 2.5G throughput license and later you can upgrade to 20G. …
- 4,389
4
votes
3
answers
9k
views
UDLD disabled interface
We have two cisco c3850 they are uplink with fiber port 10G and i am seeing this error on that trunk (uplink) port
[c3850]-----10G----[c3850]
TenGigabitEthernet1/1/4 is down, line protocol is down (err-disabled … Cisco TAC this this could be the spanning-tree loop, Really? UDLD run on physical layer how could spanning-tree can block or disable that port? …
- 4,389
2
votes
Accepted
vlan traffic flooding on all interface
here is the cisco doc: http://www.cisco.com/c/en/us/support/docs/ip/hot-standby-router-protocol-hsrp/10583-62.html#t8 …
- 4,389
2
votes
2
answers
4k
views
cisco Total output drops on interface
we have c3850 trunk with other switch 4948 and its LACP 4x1G interface bonding (etherchannel) out of 4 1G we are getting Total output drops on 2 interface.
This is all started yesterday when i upgra …
- 4,389
1
vote
1
answer
6k
views
Cisco IOS SHA-1 hash doesn't match
I download IOS from Cisco TAC and trying to load on ASR1006 but getting following error. I have compared bytes and they are same 671089864 on cisco TAC. … On Cisco TAC they have MD5 hash & SHA512 but i am not seeing any SHA-1 How do i validate its correct image? …
- 4,389
2
votes
1
answer
18k
views
Cisco NTP Clock is unsynchronized
I have two internap NTP server and i set them up on Cisco Router but this is what i am getting. …
- 4,389