10-11-2013 12:33 AM - edited 03-07-2019 03:58 PM
Hi,
When I connect my asa-5545X firewall to 2960 lanbase switch on gigabit port which is configured as an access port, that port starts generating topology changes. What can be the problem?
Thanks.
--
Erol
10-11-2013 01:08 AM
Configure: spanning-tree portfast default command on the swicth interface and then see the result.
Hope it helps.
Regards
10-11-2013 02:16 AM
That´s the solution in whole networks for Topo-change but who can explain, why?
---
Posted by WebUser LA Ola from Cisco Support Community App
10-11-2013 02:45 AM
This solves the TCN flood but still if I connect ASA to the switch our vlans start to act weird. For example two computers within the same vlan can't ping each other but another computer can ping both. Switch config is below;
interface GigabitEthernet0/3
switchport mode access
spanning-tree portfast
And my asa conifg is;
Result of the command: "show running"
: Saved
:
ASA Version 9.1(3)
!
hostname asa
domain-name xyz
enable password hGTP4tNDkziFC.TW encrypted
passwd hGTP4tNDkziFC.TW encrypted
names
!
interface GigabitEthernet0/0
nameif WAN
security-level 0
ip address xx.75.14.253 255.255.255.224
!
interface GigabitEthernet0/1
nameif LAN
security-level 0
ip address 10.0.0.240 255.255.248.0
!
interface GigabitEthernet0/2
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/3
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/4
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/5
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/6
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/7
shutdown
no nameif
no security-level
no ip address
!
interface Management0/0
management-only
nameif management
security-level 100
ip address 10.0.8.10 255.255.248.0
!
boot system disk0:/asa913-smp-k8.bin
boot system disk0:/asa912-smp-k8.bin
ftp mode passive
clock timezone EEST 2
clock summer-time EEDT recurring last Sun Mar 3:00 last Sun Oct 4:00
dns domain-lookup LAN
dns server-group DefaultDNS
name-server 10.0.0.33
name-server 10.0.0.22
domain-name xyz
object network AP
subnet 10.0.48.0 255.255.248.0
description VLAN50
object network LAB
subnet 10.0.24.0 255.255.248.0
description VLAN20
object network SMART_BOARD
subnet 10.0.40.0 255.255.248.0
description VLAN40
object network BB_Switch
host 10.0.0.253
object network WAN_GW
host xx.75.14.225
access-list LAN_access_in extended permit ip any any
access-list LAN_access_in_1 extended permit ip any any
pager lines 24
logging asdm informational
mtu WAN 1500
mtu LAN 1500
mtu management 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-714.bin
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
nat (LAN,any) source static any any
access-group LAN_access_in_1 in interface LAN control-plane
access-group LAN_access_in in interface LAN
route WAN 0.0.0.0 0.0.0.0 xx.75.14.225 1
route management 10.0.0.0 255.255.248.0 10.0.8.1 1
route LAN 10.0.24.0 255.255.248.0 10.0.0.253 1
route LAN 10.0.40.0 255.255.248.0 10.0.0.253 1
route LAN 10.0.48.0 255.255.248.0 10.0.0.253 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
aaa-server AD protocol ldap
aaa-server AD (LAN) host 10.0.0.33
server-port 389
ldap-base-dn dc=x,dc=y,dc=z,dc=z
ldap-group-base-dn ou=Groups,ou=x,dc=x,dc=x,dc=x,dc=x
ldap-scope subtree
ldap-naming-attribute sAMAccountName
ldap-login-password *****
ldap-login-dn CN=ldap user,dc=x,dc=x,dc=x,dc=x
server-type microsoft
aaa-server AD (LAN) host 10.0.0.22
ldap-base-dn dc=x,dc=x,dc=x,dc=x
ldap-group-base-dn ou=Groups,ou=x,dc=x,dc=x,dc=x,dc=x
ldap-scope subtree
ldap-naming-attribute sAMAccountName
ldap-login-password *****
ldap-login-dn CN=ldap user,dc=x,dc=x,dc=x,dc=x
server-type microsoft
user-identity domain xyz aaa-server AD
http server enable
http 0.0.0.0 0.0.0.0 management
http 0.0.0.0 0.0.0.0 LAN
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
crypto ipsec security-association pmtu-aging infinite
crypto ca trustpool policy
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 LAN
ssh timeout 5
ssh key-exchange group dh-group1-sha1
console timeout 0
!
tls-proxy maximum-session 1000
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server 10.0.0.33 source LAN prefer
ntp server 10.0.0.22 source LAN
username admin password KYSa/w/7GQlUqURl encrypted
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:7c8a85f40344725c9141690f9e73a659
: end
10-11-2013 03:24 AM
I am not much aware about ASA Config but May be windows Firewall/ASA blockig the Ping Traffic on These Computer.
Regards
Sent from Cisco Technical Support iPhone App
Sent from Cisco Technical Support iPhone App
10-11-2013 07:38 AM
Unfortunately its not that simple, when we unplug asa everything goes normal..
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