Default configuration
When you boot up the device in autonomous mode, the device looks for a default file name-the PID of the device. For example, the Cisco 8300 Series Secure Routers look for a file named C8375-E-G2.cfg or the C8355-G2.cfg. The device looks for this file before finding the standard files-router-confg or the ciscortr.cfg.
The device looks for the C8375-E-G2.cfg or the C8355-G2.cfg file in the bootflash. If the file is not found in the bootflash, the device then looks for the standard files-router-confg and ciscortr.cfg. If none of the files are found, the device then checks for any inserted USB that may have stored these files in the same particular order.
![]() Note |
If there is a configuration file with the PID as its name in an inserted USB, but one of the standard files are in bootflash, the system finds the standard file for use. |
Use the show running-config command to view the initial configuration. This example shows an example ouptut for C8375-E-G2.
Router# show running-config
Current configuration : 6621 bytes
!
! Last configuration change at 06:24:36 UTC Fri Feb 7 2025 by admin
!
version 17.15
service timestamps debug datetime msec
service timestamps log datetime msec
platform qfp utilization monitor load 80
!
hostname router
!
boot-start-marker
boot-end-marker
!
!
vrf definition Mgmt-intf
!
address-family ipv4
exit-address-family
!
address-family ipv6
exit-address-family
!
no logging console
no aaa new-model
!
no ip domain lookup
!
!
!
!
!
!
!
!
!
login on-success log
!
!
!
!
!
!
!
subscriber templating
!
!
!
crypto pki trustpoint TP-self-signed-2220840378
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-2220840378
revocation-check none
rsakeypair TP-self-signed-2220840378
hash sha512
!
crypto pki trustpoint SLA-TrustPoint
enrollment pkcs12
revocation-check crl
hash sha512
!
!
crypto pki certificate chain TP-self-signed-2220840378
certificate self-signed 01
30820330 30820218 A0030201 02020101 300D0609 2A864886 F70D0101 0D050030
31312F30 2D060355 04030C26 494F532D 53656C66 2D536967 6E65642D 43657274
69666963 6174652D 32323230 38343033 3738301E 170D3235 30313039 30393132
31315A17 0D333530 31303930 39313231 315A3031 312F302D 06035504 030C2649
4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D32 32323038
34303337 38308201 22300D06 092A8648 86F70D01 01010500 0382010F 00308201
0A028201 01008F2E D295CE5D 6DFDC027 4E7B4410 CD546B85 C14F0844 A4A08A47
3621C3A8 4AF11F97 9489AD4B 00E1C57F AEAD53CE B08B684A 9018E660 8BCFABCE
B1DCD79D 86E78BF4 DF278EF3 6C86539E 97217942 05C48B9A CBB057FB FFB2B225
5A626C11 091376D8 A81E66B2 36ECE937 B44451F5 49D9CBB7 4D674A87 6532F4A7
0A047D14 481A98A7 15574BE5 BFFFB4B1 F397C982 FECED50C 59605382 39B317F2
3183C1B4 B83F62CF 3A9D6EE8 A1A34C61 86AD6B15 5474FD41 3151540D 5E387FC8
B169558A E0DF905E F1187E78 AB59BD67 A38E97D9 79AAF825 E6D2B3A6 CF9239D6
8B5F7E7D D4645263 F6006E12 FF69C3AF 7B769A2E F7F099AE 03A336EA 294A0423
748E52EF 99330203 010001A3 53305130 1D060355 1D0E0416 04149FE1 4E1985FF
AB1E7167 F6A67B35 5F3353E3 5B88301F 0603551D 23041830 1680149F E14E1985
FFAB1E71 67F6A67B 355F3353 E35B8830 0F060355 1D130101 FF040530 030101FF
300D0609 2A864886 F70D0101 0D050003 82010100 4F0CF81D C9E72E8B 2D5BC14A
862DF349 42772862 46777631 3F402A07 DCD34CF7 5ED43C42 3C1839BB B68B0677
C0C66B83 E97A0980 A54E5444 F0473525 C592D1C0 4D6C101A DA4BCDA0 D9C36EE1
CAD752AB AA37B084 A6C5F926 ED264D20 F6EF4940 F1103FAF 7122F428 0A5221F4
DFB69177 BD7F5E67 DF662F1A F7888526 8867A938 C7F0B75B C34CDAFB 4AA2386B
10ECE4FD 348D2028 E66E2FF1 FB6B0089 3D68FB71 E993D055 47CC0AA9 F08586E3
319C0C26 86082E0A E4A9D4DA 99727580 6BEA0CF3 E530CD60 BBC627C5 16D8B483
A96D47F4 B4746157 0DD2829E 7FC7E087 BE22D84B 09EDD9D7 A2D09897 247397B5
AB6BBA3C E37BEDA0 053DE14A 748502E1 510197E4
quit
crypto pki certificate chain SLA-TrustPoint
certificate ca 01
30820321 30820209 A0030201 02020101 300D0609 2A864886 F70D0101 0B050030
32310E30 0C060355 040A1305 43697363 6F312030 1E060355 04031317 43697363
6F204C69 63656E73 696E6720 526F6F74 20434130 1E170D31 33303533 30313934
3834375A 170D3338 30353330 31393438 34375A30 32310E30 0C060355 040A1305
43697363 6F312030 1E060355 04031317 43697363 6F204C69 63656E73 696E6720
526F6F74 20434130 82012230 0D06092A 864886F7 0D010101 05000382 010F0030
82010A02 82010100 A6BCBD96 131E05F7 145EA72C 2CD686E6 17222EA1 F1EFF64D
CBB4C798 212AA147 C655D8D7 9471380D 8711441E 1AAF071A 9CAE6388 8A38E520
1C394D78 462EF239 C659F715 B98C0A59 5BBB5CBD 0CFEBEA3 700A8BF7 D8F256EE
4AA4E80D DB6FD1C9 60B1FD18 FFC69C96 6FA68957 A2617DE7 104FDC5F EA2956AC
7390A3EB 2B5436AD C847A2C5 DAB553EB 69A9A535 58E9F3E3 C0BD23CF 58BD7188
68E69491 20F320E7 948E71D7 AE3BCC84 F10684C7 4BC8E00F 539BA42B 42C68BB7
C7479096 B4CB2D62 EA2F505D C7B062A4 6811D95B E8250FC4 5D5D5FB8 8F27D191
C55F0D76 61F9A4CD 3D992327 A8BB03BD 4E6D7069 7CBADF8B DF5F4368 95135E44
DFC7C6CF 04DD7FD1 02030100 01A34230 40300E06 03551D0F 0101FF04 04030201
06300F06 03551D13 0101FF04 05300301 01FF301D 0603551D 0E041604 1449DC85
4B3D31E5 1B3E6A17 606AF333 3D3B4C73 E8300D06 092A8648 86F70D01 010B0500
03820101 00507F24 D3932A66 86025D9F E838AE5C 6D4DF6B0 49631C78 240DA905
604EDCDE FF4FED2B 77FC460E CD636FDB DD44681E 3A5673AB 9093D3B1 6C9E3D8B
D98987BF E40CBD9E 1AECA0C2 2189BB5C 8FA85686 CD98B646 5575B146 8DFC66A8
467A3DF4 4D565700 6ADF0F0D CF835015 3C04FF7C 21E878AC 11BA9CD2 55A9232C
7CA7B7E6 C1AF74F6 152E99B7 B1FCF9BB E973DE7F 5BDDEB86 C71E3B49 1765308B
5FB0DA06 B92AFE7F 494E8A9E 07B85737 F3A58BE1 1A48A229 C37C1E69 39F08678
80DDCD16 D6BACECA EEBC7CF9 8428787B 35202CDC 60E4616A B623CDBD 230E3AFB
418616A9 4093E049 4D10AB75 27E86F73 932E35B5 8862FDAE 0275156F 719BB2F0
D697DF7F 28
quit
!
!
diagnostic bootup level minimal
!
license udi pid C8375-E-G2 sn FDO2833M01A
memory free low-watermark processor 63953
!
spanning-tree extend system-id
!
!
username admin privilege 15 password 0 admin
!
redundancy
mode none
!
!
!
!
vlan internal allocation policy ascending
!
!
!
!
!
!
interface TwoGigabitEthernet0/0/0
no ip address
shutdown
negotiation auto
!
interface TwoGigabitEthernet0/0/1
no ip address
shutdown
negotiation auto
!
interface TwoGigabitEthernet0/0/2
no ip address
shutdown
negotiation auto
!
interface TwoGigabitEthernet0/0/3
no ip address
shutdown
negotiation auto
!
interface TenGigabitEthernet0/0/4
no ip address
shutdown
!
interface TenGigabitEthernet0/0/5
no ip address
shutdown
!
interface TwoGigabitEthernet0/1/0
!
interface TwoGigabitEthernet0/1/1
!
interface TwoGigabitEthernet0/1/2
!
interface TwoGigabitEthernet0/1/3
!
interface TwoGigabitEthernet0/1/4
!
interface TwoGigabitEthernet0/1/5
!
interface TwoGigabitEthernet0/1/6
switchport
!
interface TwoGigabitEthernet0/1/7
switchport
!
interface GigabitEthernet0
vrf forwarding Mgmt-intf
ip address 10.79.58.164 255.255.255.0
negotiation auto
!
interface Vlan1
no ip address
!
ip forward-protocol nd
ip tftp source-interface GigabitEthernet0
ip http server
ip http authentication local
ip http secure-server
ip route 64.104.134.61 255.255.255.255 10.79.58.1
ip route vrf Mgmt-intf 0.0.0.0 0.0.0.0 10.79.58.1
ip route vrf Mgmt-intf 0.0.0.0 0.0.0.0 64.104.134.61
ip ssh bulk-mode 131072
!
snmp-server community public RW
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
stopbits 1
line aux 0
line vty 0 4
exec-timeout 0 0
privilege level 15
login local
transport input telnet
line vty 5 10
privilege level 15
login local
transport input telnet
line vty 11 14
login
transport input ssh
!
!
!
!
!
!
!
end
This example shows an example ouptut for C8355-G2.
Router# show running-config
Current configuration : 5001 bytes
!
! Last configuration change at 09:02:29 UTC Mon Aug 18 2025
!
version 17.18
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
platform qfp utilization monitor load 80
platform resource data-plane-heavy
!
hostname Wilson1
!
boot-start-marker
boot-end-marker
!
!
vrf definition 4
!
address-family ipv4
exit-address-family
!
vrf definition 50
!
address-family ipv4
exit-address-family
!
vrf definition 65500
!
address-family ipv4
exit-address-family
!
vrf definition 65528
description SIG VRF
!
address-family ipv4
exit-address-family
!
vrf definition 65529
description Speedtest VRF
!
address-family ipv4
exit-address-family
!
vrf definition Mgmt-intf
!
address-family ipv4
exit-address-family
!
address-family ipv6
exit-address-family
!
no logging queue-limit
no logging rate-limit
aaa new-model
!
!
aaa authentication login default local
aaa authorization console
aaa authorization exec default local
!
!
aaa session-id common
no process cpu extended history
!
!
!
!
!
!
!
!
ip dhcp pool PnPWebUI1
vrf 65500
host 192.168.1.3 255.255.255.0
client-identifier 0077.6562.7569
dns-server 192.168.1.1
!
!
!
login on-success log
!
!
!
!
!
!
fhrp version vrrp v3
ipv6 unicast-routing
ipv6 rip vrf-mode enable
!
!
subscriber templating
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
crypto pki trustpoint SLA-TrustPoint
enrollment pkcs12
revocation-check crl
hash sha512
!
crypto pki trustpoint TP-self-signed-758392875
enrollment selfsigned
revocation-check crl
rsakeypair TP-self-signed-758392875
hash sha512
!
!
crypto pki certificate chain SLA-TrustPoint
crypto pki certificate chain TP-self-signed-758392875
!
!
!
!
!
!
!
!
!
diagnostic bootup level minimal
!
license udi pid C8355-G2 sn FDO2836M06D
license accept end user agreement
memory free low-watermark processor 63115
!
spanning-tree extend system-id
!
!
!
!
username admin privilege 15 secret 9 $9$nbNcaolXwfHkHk$FxUuHozuwCqmWCyltQ0YkluTGUubx2ijED8/Laeh72k
!
redundancy
mode none
!
!
!
!
!
no crypto ikev2 diagnose error
!
!
vlan internal allocation policy ascending
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback65528
vrf forwarding 65528
ip address 192.168.1.1 255.255.255.255
!
interface Loopback65529
vrf forwarding 65529
ip address 11.1.0.116 255.255.255.255
!
interface Tunnel1
ip unnumbered GigabitEthernet0/0/4
ipv6 unnumbered GigabitEthernet0/0/4
tunnel source GigabitEthernet0/0/4
tunnel mode sdwan
!
interface Tunnel100009
ip unnumbered TenGigabitEthernet0/0/9
tunnel source TenGigabitEthernet0/0/9
tunnel mode sdwan
!
interface FiveGigabitEthernet0/0/0
no ip address
negotiation auto
!
interface FiveGigabitEthernet0/0/1
no ip address
negotiation auto
!
interface FiveGigabitEthernet0/0/2
no ip address
negotiation auto
!
interface FiveGigabitEthernet0/0/3
no ip address
!
interface GigabitEthernet0/0/4
ip address 10.1.12.116 255.255.255.0
negotiation auto
!
interface GigabitEthernet0/0/5
no ip address
negotiation auto
!
interface TenGigabitEthernet0/0/6
!
interface TenGigabitEthernet0/0/7
!
interface TenGigabitEthernet0/0/8
vrf forwarding 50
ip address 8.2.1.1 255.255.255.0
no plim qos input queue 0 pause enable
!
!
interface TenGigabitEthernet0/0/9
mtu 1734
ip address 10.1.9.1 255.255.255.0
no plim qos input queue 0 pause enable
!
interface GigabitEthernet0
vrf forwarding Mgmt-intf
ip address 10.75.163.116 255.255.255.0
negotiation auto
ipv6 address autoconfig
!
interface Vlan1
vrf forwarding 65500
ip address 192.168.1.1 255.255.255.0
!
router omp
!
ip forward-protocol nd
no ip forward-protocol udp
ip tftp source-interface GigabitEthernet0
ip ftp source-interface GigabitEthernet0
ip http server
ip http authentication local
ip http secure-server
!
ip nat settings central-policy
ip nat settings gatekeeper-size 1024
ip nat route vrf 65528 0.0.0.0 0.0.0.0 global
no ip nat service all-algs
ip route 0.0.0.0 0.0.0.0 10.1.9.2
ip route vrf Mgmt-intf 0.0.0.0 0.0.0.0 10.75.163.1
ip route vrf 50 0.0.0.0 0.0.0.0 10.1.9.2
no ip ssh bulk-mode
ip scp server enable
!
no ipv6 mld ssm-map query dns
!
!
!
!
!
control-plane
!
!
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable
!
mgcp profile default
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
activation-character 13
stopbits 1
speed 115200
line aux 0
activation-character 13
line vty 0 4
privilege level 15
activation-character 13
transport input all
line vty 5 80
privilege level 15
activation-character 13
transport input none
!
no network-clock revertive
!
!
!
!
!
!
!
!
!
!
!
!
netconf-yang
netconf-yang feature candidate-datastore
no netconf-yang ssh server algorithm encryption aes128-cbc
no netconf-yang ssh server algorithm encryption aes256-cbc
no netconf-yang ssh server algorithm hostkey ssh-rsa
no netconf-yang ssh server algorithm kex diffie-hellman-group14-sha1
no netconf-yang ssh server algorithm mac hmac-sha1
end